apeiros changed the topic of #ruby to: Ruby 2.1.5; 2.0.0-p598; 1.9.3-p551: http://ruby-lang.org || Paste >3 lines of text on http://gist.github.com || this channel is logged at http://irclog.whitequark.org, other public logging is prohibited
<volty> go with @@VAR = ....
<czhang> i'm not really sure what you mean by upstream in this context
<atmosx> $VAR
<atmosx> kill it
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<pipework> $_______HI
<atmosx> make it thread-unsafe
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<volty> ahah
<atmosx> write a comment # I DID IT ON PURPOSE!
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<jhass> $☃
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<pipework> If you aren't dynamically shelling out to an assembly compiler and then calling it in your ruby, you ain't shit.
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* jhass opens feature request to change all instances of $ into
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<zenspider> pipework: if you're not dynamically assembling in ruby, you ain't shit
<pipework> zenspider: Oh that's fantastic.
<zenspider> it's _horrible_
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<pipework> same thing, right?
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<maestrojed> jhass yo have been very helpful and I don't want to bug. But I am going to try for one more question. My data in Ruby terms is a hash. I am trying to pass this to a shell script and expecting it to be an array. Is that an issue? Do I need to cast this data as an array?
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<zenspider> I can't actually test it anymore because I don't have a 32 bit build of ruby
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<zenspider> I should set up a simple vmware slice of freebsd to test wilson on
<jhass> maestrojed: my shell scripting isn't too good, but afaik there's no equivalent datastructure
<jhass> so you need to think about what parts of the hash you want and how
<jhass> then build something with that data that the shell script can interpret
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<maestrojed> jhass ok, thanks. I think I just found a work around. I want it to be a hash or array so I can count how many items and loop. I see with bash I can count the number of passed arugments. So I am going to do that and move forward. I feel like I am beating my head on a wall
<jhass> sounds ugly
<jhass> just count in ruby?
<pipework> Can you use a not shell script?
<asterite> jhass: the rubinius blog post about "multiple dispatch" looks a lot like our array class: https://github.com/manastech/crystal/blob/master/src/array.cr#L105 :-P
<jhass> asterite: yeah, except that we couldn't figure out how they intend to do type restrictions + default args
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<maestrojed> jhass I can count in ruby and pass two arguments, the collection and the count. OR I can just pass the collection and count the variables in bash. Both are not the solution I wanted. Both seem equally ok/bad. No?
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<maestrojed> pipework this is just a small part of this script. So yeah, it have to stick with shell for now
<maestrojed> I guess it doesn't have to be shell. I could run multiple scripts. Good thought
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<jhass> maestrojed: it sounded like you only need the count. so again just build ruby array of wanted values, .join(' ') and pass as single arg, then # in bash?
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<maestrojed> jhass I don't need to just count. I need to perform a number of actions for each item. I just won't know how many items.
<maestrojed> so if I join() in ruby. I would have to explode in bash (or the bash equivalent of explode whatever it is).
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<atmosx> maestrojed: explode... like nitrogen?
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<maestrojed> atmosx I just mean break apart a string based on a delimiter and store as a array
<atmosx> ah k
<maestrojed> atmosx badaBOOM
<jhass> maestrojed: yes, that was the idea: array=($1); ${#array[@]}
<atmosx> big bada-boom!
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<maestrojed> atmosx multipass
<atmosx> ahahaha lilu > *
<maestrojed> :)
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<atmosx> I think Mila Jovovich in that character was most beautiful women in the world.
<maestrojed> I understand were you are coming from :)
<maestrojed> jhass you have been very helpful, thank you!
<jhass> for item in ${array[@]}; do
<jhass> that'll iterate over the array, no need to count it even
<maestrojed> rocking!
<maestrojed> thanks
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<mostlybadfly> Is that Ruby?
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<jhass> no shellscript
<mostlybadfly> Oh haha
<mostlybadfly> I was afraid I missed something :D
<jhass> maestrojed: no need for the =($1) hack even, just for item in $1; do should work. where $1 is a space separated list
<jhass> given there are no spaces in the items
<jhass> note the lack of quotes
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<omosoj> out of curiosity, why is the convention to use ":" in irc instead of "," when referring to someone?
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<maestrojed> jhass ok, thanks. I am pouring over this and running tests/examples. Thanks
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<jhass> omosoj: no strong convention afaik, just what most clients autocomplete to
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<omosoj> jhass, i see
<jhass> I see people doing nick, too
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<omosoj> nick?
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<blah> oops
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<jhass> "nick,"
<pipework> omosoj: Most clients use a default separator of ': '
<pipework> I've had many fun ones.
<atmosx> night all
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<volty> as in the written language: the colons separate reference and content
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<omosoj> yeah i guess a colon is technically correct, but i think the comma is more personable
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<volty> the first ircers were very very polite and conforming ppl :)
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<benzrf> omosoj: i tend to use a comma when i use a name as part of a message
<benzrf> the colon separatator suggests that the nick is merely a means of directing to whom you are speakingcode
<benzrf> and is not actually meant to be read along with the message
<benzrf> er
<benzrf> *speaking, not speakingcode
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<omosoj> ah that makes sense.
<benzrf> omosoj: this message is like saying just the part after the colon while looking @ you if this were irl
<benzrf> omosoj, you're doing it wrong <- like saying your name
<benzrf> at least, that's what it feels like in my head
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<omosoj> benzrf, in my head i think about us all being in a room and me prefacing my comment with your name to get your attention
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<omosoj> but i see your point. it's not really read, it's only to direct your attention to it
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<hephaestus_rg> hi i'm tring to use rbenv to install 2.1.5
<hephaestus_rg> this should work right? rbenv install 2.1.5
<hephaestus_rg> it says "ruby-build definition not found"
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<ratdaddy> hephaestus_rg, it sounds like you need to install ruby-build too: https://github.com/sstephenson/rbenv#installing-ruby-versions
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<hephaestus_rg> i'm using ubuntu. if i do rbenv install --list i see a bunch of versions on that list
<hephaestus_rg> but no 2.1.5
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<jhass> hephaestus_rg: update ruby-build
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<hephaestus_rg> i don't see anything about how to update here https://github.com/sstephenson/ruby-build
<hephaestus_rg> what am i missing
<jhass> google?
<hephaestus_rg> do i need to reinstall like i did originally?
<hephaestus_rg> or can i get it from apt-get
<hephaestus_rg> never mind i found a relevant looking wiki page
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<sliceberg> Hi, all. I know this is somewhat irrelevant, feel free to flame. In an effort to please homebrew,
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<sliceberg> I removed Xcodes (and xcode-select, xcodebuild...er).
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<jhass> sliceberg: there's #machomebrew
<hephaestus_rg> oh ok i figured it out this did it: cd "$(rbenv root)"/plugins/ruby-build && git pull
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<sliceberg> jhass: Yeah, I was there earlier. Crickets.
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<sliceberg> jhass: Thank you.
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<zenspider> sliceberg: what's up?
<jhass> How about #apple, ##mac, #MacOSX
<zenspider> removing xcode is a big mistake. esp if you removed xcode-select and friends
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<giuseppesolinas> best android emulator for web design? if it's ot do you know any dedicated channel?
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<jhass> giuseppesolinas: /msg alis help
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<sliceberg> yeah, i did, and I'm paying for it
<sliceberg> lost half a day :(
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<zenspider> sliceberg: that's what time machine is for
<giuseppesolinas> android
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<giuseppesolinas> ops
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<zenspider> restore xcode-select from your local time machine (/Volumes/MobileBackups)
<sliceberg> zenspider: for sure, just trying to resolve the problem in order to understand it before I resort to time machine
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<zenspider> then run sudo xcode-select --install
<sliceberg> zenspider: the only problem is, xcode-select wasn't working before I destroyed it
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<zenspider> "wasn't working" == no information
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<sliceberg> OK, OK.
<sliceberg> zenspider: sry
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<sliceberg> zenspider: I was just trying to give you a summary.
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<sliceberg> zenspider: when xcode-select --install was called, I would get the options prompt instead
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<zenspider> what OS are you on?
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<sliceberg> OSX 10.9.5
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<zenspider> what xcode did you have?
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<sliceberg> Had 4.1
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<sliceberg> :/
<sliceberg> I nvr use Xcode, obviously.
<zenspider> apeiros: can you ban byprdct until they fix their network/clien?
<zenspider> t
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<zenspider> 10.9 comes with xcode-select afaik, so it should have worked
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<zenspider> I think you're gonna have to install xcode anew. then run `sudo xcode-select --install`
<zenspider> then you can delete the xcode app
<zenspider> I don't know of another way to repair
<zenspider> without using something like pacifier maybe
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<sliceberg> zenspider: Thank you for your help.
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<zenspider> n/p
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<smartshaila> Is this the right channel for Rails-specific questions, or is there a better one to ask in?
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<jhass> smartshaila: Please join #RubyOnRails for Rails questions. You need to be identified with NickServ, see /msg NickServ help
<smartshaila> jhass: Thanks much!
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<hephaestus_rg> is there a verbose mode for rbenv install? it seems like it's taking an awfully long time
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<havenwood> Friday! \o/
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<weeb1e> Why on earth is Process::Status.new undefined?
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<weeb1e> How are you supposed to create a Process::Status instance for custom implementations?
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<weeb1e> I'm going to have to reimplement the important parts of Process::Status from scratch now :(
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<weeb1e> Not exactly a huge amount of work, but I'm still interested in the logic behind removing the ability to create Process::Status instances, it goes against everything ruby
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<eam> well not against everything
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<weeb1e> Ruby is all about being open and not limiting you, which is why I was surprised to come across this, albeit small, limitation
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<eam> >> ObjectSpace.each_object(Class).select {|o| !o.respond_to? :new }.length / ObjectSpace.each_object(Class).to_a.length.to_f * 100
<eval-in__> eam => 7.326007326007327 (https://eval.in/221640)
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<eam> 7% of ruby classes don't let you instantiate
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<weeb1e> Interesting
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<weeb1e> Not sure what the logic is behind that though
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<weeb1e> Certain classes may have no use case ever, but Process::Status could have plenty of use cases
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<eam> I agree, doesn't seem reasonable
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<acmehandle> Have a question about sass anyone here?
<eam> $? is essentially a fancy bunch of stuff around an integer
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<weeb1e> Exactly
<weeb1e> Well, 2 integers, the pid and exit code
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<weeb1e> I just spent hours learning a bunch of WinAPI stuff so that I could implement reliable event based process management with FFI
<weeb1e> I expected to just be able to wrap the exit code in Process::Status.new
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<acmehandle> When I run sass myfile.scss which has @import '3rdparty' in it will the output file have both files in it completely? Or is it only supposed to have @import '3rdparty' and my code
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<peteyg> Is there a way to monkey patch a function so that it will automatically invoke another function prior to itself?
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<peteyg> Basically for debugging purposes, I want to count how many times a function is called, so I want it to trigger another function which simply adds to a global counter
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<ruber> I just ran 2 scripts comparing: puts 'Hi' ; sleep 30 .... with .... (Perl) print 'Hi' ; sleep(30)
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<ruber> Ruby used 6.9Mb RAM while Perl only used 1.3Mb. Any ideas why?
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<b3itz> ok im beating my head on a wall... why does my calcTriangleArea return 0 every time? https://gist.github.com/anonymous/c5f36862b961f06c4b3e
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<rpage> hello everyone. hope everyone doing well. question, is there any unix-like system utilities gem?
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<theotherstupidgu> hi rpage
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<theotherstupidgu> i don't know about a gem(but sure there is) however there are a number of ways to talk to *nix via ruby http://tech.natemurray.com/2007/03/ruby-shell-commands.html
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<glaksmono> anyone is around?
<theotherstupidgu> glaksmono hi
<glaksmono> theotherstupidgu, any ideas how to have this to be timezone sensitive? https://gist.github.com/glaksmono/3dd2989603e1d81c8339
<glaksmono> Payment.last.created_at is definitely correct
<glaksmono> but in the database it seems to be incorrect :-S
<glaksmono> so when i query, the aggregation data is in UTC
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<theotherstupidgu> thats a rails app?
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<glaksmono> yeah... theotherstupidgu
<theotherstupidgu> you should try #rails instead
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<agent_white> Evenin'
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<shevy> txdv \o/ you are right ... you did it while I was sleeping
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<shevy> so people
<shevy> more ruby code!
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<agent_white> Whoa
<agent_white> Hashes can have arrays/hashes as keys...
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<shevy> objects can serve as keys too
<shevy> though I still have not found out how that is really useful
<Hanmac> agent_white: hashes can even have itself as keys too ;P
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<shevy> omg
<agent_white> That's crazyness
<agent_white> like...
<agent_white> >> puts "hai"
<eval-in__> agent_white => hai ... (https://eval.in/221744)
<Hanmac> >> a = {}; a[a] = a; a
<eval-in__> Hanmac => {{...}=>{...}} (https://eval.in/221745)
<agent_white> >> [1,2,3].map { |e, h = Hash.new| h[e] = e.to_s; h }
<eval-in__> agent_white => [{1=>"1"}, {2=>"2"}, {3=>"3"}] (https://eval.in/221746)
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<shevy> dumdedum
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<shevy> huh
<shevy> why is gem version 2.2.2
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<godd2> shevy are you asking why gem doesn't have the same version number as ruby itself?
<shevy> no
<shevy> I compiled 2.1.5
<shevy> I also have rubygems-2.4.1.tar.xz
<shevy> but gem version was at 2.2.2 or so
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<shevy> something is broken now
<shevy> ERROR: Loading command: install (NameError)
<shevy> undefined method `is_file' for class `Gem::Package::TarReader::Entry'
<godd2> oh, well then I have no idea
<shevy> I will try gem version 2.4.4
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<shevy> everything works again now \o/
<shevy> Pushing gem to https://rubygems.org...
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<shevy> agent_white wanna learn Ruby-C with me?
<agent_white> YeS
<shevy> \o/
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<shevy> I shall somehow prepare this ... perhaps something similar to how chris pine structured his learn to program tutorial
<shevy> agent_white in C, globals such as $foo in ruby as declared via the "extern" statement
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<zenspider> hrm?
<zenspider> shevy: what are you up to?
<agent_white> zenspider: TUCK YER SHIRT IN. shevy is teaching!
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<zenspider> sir, yes sir
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<zenspider> you two aware of the book "ruby under a microscope"?
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<shevy> zenspider well, I am using ruby quite happily since a long time, but C is significantly harder and I often gave up in the past. This time I set out to learn it properly, including commenting stuff (and as I asked for other newcomers, obviously I am scared of boring myself again just like in the past and giving up again, so I need good motivating cheering folks like agent_white)
<shevy> \o/
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<shevy> I haven't heard of ruby under a microscope yet
<DLSteve> shevy, C is harder to learn as it will happily allow you to shoot yourself in the foot. On the other hand it is extremely powerful.
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<agent_white> Is there a way to auto-trim LONG ASS arrays in pry? Like... if I have 500 elements, any way to split it so they start taking up horizontal space in the terminal?
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<agent_white> I dream of learning C. But refuse to let myself until I am OK at ruby.
<mozzarella> puts it?
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<mozzarella> or maybe you can pipe it through less
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<wasamasa> agent_white: I thought pry would autopage it
<agent_white> Didn't for me :/
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<wasamasa> then it's not huge enough :P
<aob> Hi, I want to write a method that checks if a symlink goes where I expect; what's the best way to catch the Errno::ENOENT in the case that the symlink doesn't exist? I really just want to return true or false
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<aob> is it as simple as wrapping in begin, rescue, else, end?
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<agent_white> wasamasa: It is ~2200 entries... I just need to expand my bash_history limits :P
<wasamasa> agent_white: oh jeez
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<zenspider> agent_white: require 'pp'; pp ary
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<agent_white> zenspider: Is there an auto-require for it into pry?
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<apeiros> agent_white: create a ~/.pryrc and add whatever you want
<agent_white> oooo hotdog
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<banister> agent_white pry does not page content that is output with puts, it'll page expression output though
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<agent_white> banister: Ahhhh alrighty
<agent_white> It wasn't even puts, just the return value
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<banister> agent_white the return value should be paged
<agent_white> Hm
<banister> agent_white: try this: (1..1000).to_a
<agent_white> banister: Aye, not paged :/
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<banister> agent_white then your pager isn't working :)
<agent_white> D:
<agent_white> /
<agent_white> :D
<agent_white> I'll look into it!
<agent_white> banister: thank ya
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<banister> agent_white what is the result of: Pry.config.pager
<agent_white> true
<banister> ok
<banister> agent_white what OS are you on?
<agent_white> banister: Maybe... http://stackoverflow.com/a/2136299 ?
<banister> no
<agent_white> banister: Linux 3.14.22-1-lts
<agent_white> banister: That wouldn't do it?
<agent_white> Definitely is a... few years out of date :P
<banister> that's nothing to do with the pry pager
<agent_white> banister: I use urvxt-unicode in i3.
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<wald0> what is exactly an :element ?
<wald0> its the same as an instance-variable?
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<agent_white> wald0: ?
<agent_white> >> :element.class
<eval-in__> agent_white => Symbol (https://eval.in/221758)
<apeiros> wald0: :element is a Symbol literal. like "element" is a String literal, 123 an Integer literal etc.
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<pontiki> argh character encodings!!!!
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* pontiki shakes fist!!
<wald0> how i can know "what is a symbol" ?
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<wald0> [24] pry(main)> show-doc Symbol
<wald0> Error: Couldn't locate a definition for Symbol!
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<wald0> pontiki: remove windows
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<pontiki> i don't have windows
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<wald0> what is your encoding problem pontiki ?
<pontiki> in `split': invalid byte sequence in UTF-8 (ArgumentError)
<agent_white> I have 3 but it's too cold to open them
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<pontiki> how in the hell do i find out which character is the offending one??
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<wald0> pontiki: ruby don't simply manage correctly utf8 characters? im confused
<wald0> agent_white: how to know "what is a symbol" ? show-doc in pry dont tell me it
<pontiki> they're likely some crack-headed windows character that came along with the web page
<agent_white> erm
<agent_white> not that!
<agent_white> hahah
<agent_white> wald0: ^^
<agent_white> pontiki: Probably those guys who run around town with the dingbats gang. Buncha hooligans.
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<apeiros> pontiki: String#scrub can help you to find the position
<apeiros> wald0: the point is that pontiki has something which is not utf-8. so there's no way to "handle it correctly"
<pontiki> oh thank you!
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<pontiki> aww, crap, not in this version of ruby :((
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<agent_white> Ooo
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<wald0> so symbols are just alias/links to another thing?
<wald0> pontiki: as i said, remove windows :), you said "argh", all the argh problems comes by a windows cause
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<apeiros> pontiki: each_char then
<pontiki> apeiros: or upgrade :)
<apeiros> the individual chars can be tested for .valid_encoding?
<apeiros> pontiki: yes, of course, or that :)
<apeiros> wald0: symbols are objects
<apeiros> wald0: like strings are objects and integers are objects
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<agent_white> symbols are lightweight strings
<apeiros> wald0: and unlike most classes, there exists syntax to directly construct a symbol.
<apeiros> and syntax to construct objects directly is called "literal". because you have the object literally in your code.
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<MattB2> Given a hash with numeric values, how would you sum each set of n elements, using the first key from each set to store the resulting value. Specifically, the keys are date-strings in the form 'YYYY-MM-DD', and n is 7. (Assume for the moment that the dates are consecutive...)
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<MattB2> I'm looking at take and reduce, but not seeing a practicle way to combine them!
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<apeiros> MattB2: I don't follow. can you make an example? input & output (gist.github.com preferably)
<wald0> apeiros: i still a bit confused:
<wald0> Person = Struct.new(:name, :gender, :age) ; fred = Person.new("Fred") ; puts fred.name
<wald0> this looks to me like an "instance variable"
<apeiros> you are indeed confused
<apeiros> nowhere in your code is an instance variable at all
<shevy> haha
<wald0> :name == @name ? hum
<apeiros> fred.name # method call, no ivar
<apeiros> let me add to your confusion:
<shevy> wald0 don't let him confuse you
<apeiros> >> Person = Struct.new("Person", "name", "gender", "age") ; fred = Person.new("Fred") ; puts fred.name
<eval-in__> apeiros => Fred ... (https://eval.in/221759)
<apeiros> wald0: as I said before, symbols are *objects*. variables are not objects.
<apeiros> variables are "containers" for objects. they reference objects. they are not objects themselves.
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<apeiros> i.e., objects are value. variables are means to store and access values.
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<wald0> mmh, i think that I see
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<apeiros> wald0: a variable can be on the left side of an assignment. an object can't. `"foo" = 1` is not valid ruby. the same way `:foo = 1` is not valid ruby. `@foo = 1` is valid ruby.
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<MattB2> input: {"2014-10-1" => 8, "2014-10-2" => 0, "2014-10-3" => 1, "2014-10-4" => 3, "2014-10-5" => 9, "2014-10-6" => 4, "2014-10-7" => 2, "2014-10-8" => 8, "2014-10-9" => 3, "2014-10-10" => 1, "2014-10-11" => 5}
<MattB2> output: {"2014-10-1" => 27, 2014-10-8 => 17}
<MattB2> So basically, 7 days of data are reduce to a weeks worth
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<MattB2> Using the first date of the set as the ley
<MattB2> *key
<apeiros> iterate over it with .each, convert the key to a date. generate the new key from that date and sum it.
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<apeiros> if you use rails, there afaik is a method to get the begin of a week. without rails, you can use Date.commercial.
<MattB2> Not too bothered about whether they're calendar weeks for the moment, happy to take the first date of the set
<MattB2> Not quite following your method though... iterate and convert String to Date?
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<apeiros> so you can get the calendar week from it
<apeiros> you need a way to map your current key (individual day) to your new key (calendar week + year)
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<MattB2> apeiros: Ah, I see what you're saying. Yeah, I was hoping to avoid the conversion to date and back somehow, by just using the 1st, 8th etc date of the set as the key for the subsequent 6, or something like that, by your method is probably better as it aligns to the actual start of the week, and deals with gaps in the set.
<apeiros> MattB2: are the dates consecutive AND without gaps?
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<Hanmac> Matt82:
<Hanmac> >> require "date"; data = {"2014-10-1" => 8, "2014-10-2" => 0, "2014-10-3" => 1, "2014-10-4" => 3, "2014-10-5" => 9, "2014-10-6" => 4, "2014-10-7" => 2, "2014-10-8" => 8, "2014-10-9" => 3, "2014-10-10" => 1, "2014-10-11" => 5}; data.chunk{|k,_| Date.parse(k).cweek}.map {|k,v| [v.first.first,v.map(&:last).inject(0,:+)]}.to_h
<eval-in__> Hanmac => {"2014-10-1"=>21, "2014-10-6"=>23} (https://eval.in/221760)
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<apeiros> MattB2: if they're without gaps, use .each_slice(8)
<apeiros> err, each_slice(7)
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<apeiros> if you have gaps, conversion will be inevitable
<zenspider> chunk... haven't had a use for that yet
<zenspider> group_by all the time... not chunk
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<MattB2> aperios: I was assuming so for the purpose of the example, and was going to worry about filling in any gaps as a pre-process, but that begins to sound like more overhead than conversion...
<Hanmac> zenspider: hm for that group_by would be the same
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<zenspider> chunk is basically like a streaming partition, right?
<apeiros> yes
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<zenspider> so, a high-brow flip-flop
<apeiros> well, unlike partition, it results in N chunks
<apeiros> not just 2
<zenspider> I do like the flip-flop operator, not that I actually use it
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<MattB2> Hanmac, I have no idea how that works, but thanks!
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<MattB2> Hanmac: Also, why are the output dates 5 days apart?
<Hanmac> MattB2: depending on the data you might repacle the chunk with group_by
<Hanmac> MattB2: because different cweek
<MattB2> I think I need to go read up on chunk...
<Hanmac> >> require "date"; Date.parse("2014-10-1").upto(Date.parse("2014-10-11")).map {|d| [d.strftime, d.cweek]}
<MattB2> Hanmac: so grouping all the keys in a cweek, and using the first date in that set as the key for the result?
<eval-in__> Hanmac => [["2014-10-01", 40], ["2014-10-02", 40], ["2014-10-03", 40], ["2014-10-04", 40], ["2014-10-05", 40], ["2014-10-06", 41], ["2014-10-07", 41], ["2014-10-08", 41], ["2014-10-09", 41], ["2014-10-10", 41], ... (https://eval.in/221761)
<Hanmac> MattB2: yes, as you can see, "2014-10-06" is the first date with the next cweek
<MattB2> Hanmac: HTF does anyone's brain (and fingers) work that fast? This stuff takes me hours!!!
<shevy> MattB2 you need to integrate it into your brain
<MattB2> Gonna go have lunch then play with everything I've learned. Thanks apeiros, zenspider, Hanmac!
<MattB2> shevy: If I could do that matrix style everything would be so much easier! :)
<MattB2> Later!
<Hanmac> shevy recently i had space problems on my harddisk ... then i did "make clean" in some of my folders ... and i got > 5GB more space ;P
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<shevy> omg
<shevy> 5 gigs
<apeiros> MattB2: if you use week + year for conversion, don't forget that civil year != commercial year
<shevy> what kind of mini hdd do you have?
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<Hanmac> shevy: i have big hdds ... i mean i got > 5GB more free space after i did "make clean" in some of my project folders ... (that was some compiled stuff)
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<wald0> 5gb Hanmac ? what you had installed?
<wald0> mmmh, the tutorial of ruby in tutorialspoint.com looks really nice
<Hanmac> wald0: did you compile yourself something big like wxWidgets? it seems the meta data stuff and all the samples around are that big when compiled ...
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<MattB2> data.chunk{|k,_| Date.parse(k).cweek}.map {|k,v| [v.first.first,v.map(&:last).inject(0,:+)]}
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<MattB2> Oops, sorry!
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<apeiros> I would use each_with_object, not chunk
<apeiros> and for the accumulator: Hash.new(0)
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<otherj> can anyone point me at the proper way to do this? https://gist.github.com/majnun/dd861e6e302a083bef59
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<atmosx> hello
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<apeiros> otherj: 12.step(1, -1)
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<godd2> otherj ranges are begin..end not end..begin
<otherj> hm. ok. that works, but I'm not sure why the other way doesn't. is .. syntax depredicated?
<otherj> oh, makes sense
<godd2> I mean you COULD do a to_a.reverse
<godd2> >> (1..12).to_a.reverse
<eval-in__> godd2 => [12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1] (https://eval.in/221772)
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<apeiros> *sob*
<apeiros> 15:37 apeiros: otherj: 12.step(1, -1)
* apeiros feels invisible
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<otherj> I was talking to you at first!
<otherj> apeiros, you're a hero. thanks.
<apeiros> ah. I thought you were talking to godd2
<apeiros> no, the syntax is not deprecated. but Range#each works by calling .succ on the elements
<apeiros> and 12.succ is 13, so it can't step through to 1
<certainty> if end < start it should use pred instead
<godd2> 12.downto(1) would be another one
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<certainty> probably the best option
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<godd2> as long as he's using integers. to_a.reverse will work for any range
<certainty> given the context downto fits the bill pretty well
<apeiros> certainty: I agree. with some classes it won't work, though. String e.g.
<apeiros> ah, d'uh, yeah. downto is best.
<apeiros> godd2: no need to create potentially large objects for something like that.
<godd2> yea since to_a.reverse isn't lazily evaluated :(
<apeiros> it couldn't possibly be lazily evaluated
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<otherj> I like you guys
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<apeiros> I should revise "won't work". it would produce something where (start..end).to_a != (end..start).to_a.reverse
<godd2> I agree. I wasn't lamenting that it was implemented in a way I disagree with, just that "my solution" was less efficient in terms of object creation.
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<shevy> otherj we love you too!
<shevy> godd2 let's not talk in such nice words
<shevy> godd2 let's just say
<shevy> godd2 your solution STUNK!
<shevy> btw I have no idea what the topic is
<centrx> *slow clap*
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<shevy> centrx must have a shevy keyword-trigger on IRC :>
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<centrx> IRC is a scourge on the face of the earth and shevy's feet smell like roses
<shevy> that so reminds me of PHP
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<centrx> Limited RAM: Limited vocabulary
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<godd2> I've got the cologne "Odeur de Shevy's Feet" on preorder.
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<shevy> txdv look what is happening
<shevy> I am for sale
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<shevy> god, you people are so silent on saturdays
<shevy> I had an interesting remark from #bioinformatics
<shevy> someone there said that in 2015 it will be time for perl 6
<shevy> because apparently (???) Larry Wall announced a feature freeze
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<txdv> shevy: so?
<txdv> this is ruby
<godd2> this is madness
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<rpag_> shevy, you can use perl6 today, but it's suppose to be slower than perl5
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<rpag_> shevy, perl6 just took way too long :)
<volty> why just perlers do not switch to ruby ?
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<rpag_> volty, they like perl, a lot
<volty> yes, felt in love with the dinosaur
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<shevy> this is #sparta!!!
<shevy> volty because they are too old to transition
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<shevy> I learned that in february 2014 at my old workplace
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<shevy> they have no need to switch
<shevy> they are just data crunching daily
<shevy> so perl suffices for that
<shevy> ruby would have to be like 10x better for them to consider switching
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<godd2> or 10x faster
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<shevy> hehe
<benzrf> perlers dont switch to ruby because it's too principled
<benzrf> ( ͡° ͜ʖ ͡°)
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<shevy> nah
<shevy> they are a pragmatic type
<godd2> lol sounds like a reason to not switch to Python
<shevy> rubygems must not be equally good as cpan - it must be SIGNIFICANTLY better than cpan
<shevy> I think perl is still faster for text processing
<jhass> cpan sucks
<shevy> hehehe
<shevy> it was good in 2001
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<jhass> it has a horrible UI and is terrible to package
<jhass> yes
<jhass> like Perl I guess
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<jhass> good thing that was before my time
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<shevy> well
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<shevy> you need old coworkers jhass
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<shevy> all of who will be using perl predominantly
<shevy> and you'll be the only odd type in the room
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<shevy> "Hi! I use ... Ruby ..."
<jhass> I have no problem with that
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<benzrf> shevy: no, i mean RUBY is too principled
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<rpag_> jhass, funny, a perl'er i know said rubygems sucks :-X
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<jhass> I at least pretend to have reasons. Did he?
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<rpag_> yup
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<rpag_> he didn't expand on why, except to say thats the reason he went back to perl
<rpag_> i think he expected everything to work the same way as perl
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<shevy> well
<shevy> without giving a reason it is hard to say much about it
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<certainty> maybe because perl6 :D
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<shevy> but perl6 what is it
<shevy> parrot is dead
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<shevy> ftp://ftp.parrot.org/pub/parrot/releases/supported/6.9.0/parrot-6.9.0.tar.gz
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<shevy> "You will also need Perl 5.8.4 or newer and Storable 2.12 or newer in order to run various configure and build scripts."
<shevy> so cool
<shevy> for the future perl
<shevy> I need legacy perl
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<eam> shevy: I can give you a few reasons
<eam> rubygems is really poorly structured
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<eam> take a look at the number of file accesses needed to load a gem vs just a ruby module
<eam> don't even need to consider perl, ruby gem vs ruby module illustrates the problem perfectly
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<godd2> eam when you say ruby module do you mean something from ruby stdlib?
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<certainty> shevy: wasn't perl6 announced lately. I mean this time for real
<eam> I mean how require works without the gem add-on stuff
<godd2> dude I have the solution. Rubygems asset pipeline. Let's do it.
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<shevy> certainty yeah, I have heard that Larry did so on the mailing list
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<shevy> eam dunno how gem does it but I assume in the end it is all based on require's
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<eam> normal modules are just "look for the file in $:"
<eam> gem is ... complex
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<eam> and gem gets slower the more gems you have installed
<rpag_> certainty, perl6 is downloadable and usable today yup
<certainty> shevy: rpag_: i see
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<shevy> rpag_ if you have perl5!!!
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<certainty> not that i'm particularily interested in using it ... but ...
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<certainty> eam: i don't know how the gem load mechanism works internally but i do expect that it's more complex that just loading or require'ing a file. It covers much more complex scenarios
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<certainty> s/that/than/
<rpag_> shevy, its not that uncommon, rubinius needs a ruby to bootstrap it too
<shevy> really?
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<certainty> bootstrap compilers/interpreters are a common thing
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<shevy> #!/usr/bin/env ruby
<shevy> you are right
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<shevy> their configure file is fake
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<shevy> it's a damn ruby file
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<shevy> that teaches us that only the source is the real thing
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<centrx> Documentation is for lowly humans or bad code
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<shevy> most code is pretty bad
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<shevy> most documentation is also pretty bad
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<shevy> some explanations on blogs are pretty good
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<shevy> ohhh
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<shevy> #perl has one good think - their bot links to remote stuff
<shevy> helpa: tutorials
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<shevy> :(
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<godd2> !tutorials
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<ruby-hel1> Hi, i'm trying to figure out how i can take an output to the screen and be able to use it in an ifstatement.
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<BraddBitt> input = gets.chomp
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<shevy> :)
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<eam> certainty: yeah, poorly :)
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<ruby-hel1> BraddBitt: Thanks, ive tried that in the past and havent quite go it to work. can you tell me where im going wrong? When i execute the script it just hangs
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<shevy> hangs?
<BraddBitt> works for me, ruby-hel1
<shevy> don't you pass it input?
<BraddBitt> ^
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<BraddBitt> the terminal will appear to hang as it is waiting for you to type something
<BraddBitt> perhaps a prompt would make this clearer?
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<ruby-hel1> by hangs i mean i dont receive any output nor does the script fail and return to a prompt
<shevy> and do you give any input to it
<godd2> print "> "; input = gets.chomp
<shevy> because gets.chomp demands user input ruby-hel1
<BraddBitt> like this ruby-hel1 https://paste.ee/p/P4cll
<ruby-hel1> i dont want to give it any keyboard input
<shevy> then why do you use gets.chomp
<godd2> because we told him to
<ruby-hel1> because thats what BraddBitt suggested
<shevy> BraddBitt did so!
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<shevy> let's spank BraddBitt!
<ruby-hel1> lol
<BraddBitt> wait, I'm sorry, I thought you wanted to use input
<godd2> ruby-hel1 wants to take the output from curl
<BraddBitt> i didn't read your question correctly I guess
<shevy> let's spank both
<BraddBitt> ohhhh
<BraddBitt> I see now
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<BraddBitt> thats a bit more complicated
<BraddBitt> but possible
<shevy> ruby-hel1 ok you use ``
<ruby-hel1> i tried it with cases and couldnt get it to work
<shevy> ruby-hel1 the result of that command is available in the variable you use there
<shevy> ip = `curl -sk ifconfig.me`
<shevy> now you can scan what ip contains
<ruby-hel1> i read using backticks should display to standard output ?
<shevy> nono
<shevy> you use backticks to invoke a system command (through sh)
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<ruby-hel1> ah
<shevy> this alone will not put anything to stdout, but you can use puts of course
<godd2> ruby-hel1 no backticks will just run the command to the system. you still need to puts it
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<ruby-hel1> puts will do that?
<shevy> yeah
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<shevy> you already use it in your script too
<shevy> puts "not my ip #{input}"
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<BraddBitt> puts will "put string" to output
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<ruby-hel1> so in order to run an ifstatement on the output of the curl command i need to 'puts' it to the screen first?
<ruby-hel1> i must be wrong there
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<ruby-hel1> i dont want to display the output of the ip address before its got to the ifstatement section. From there the ifstatements should decide what happens to the output
<ruby-hel1> also is there any benfit of using cases over ifstatements in my example ?
<godd2> ruby-hel1 no the curl command will return some string. puts is just one thing you can do with that string
<jhass> what the hell
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<ruby-hel1> could someone show me a working example please?
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<jhass> why is your first impulse still not "what the hell why do you shell out to curl"
* jhass spanks the whole channel
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<jhass> ruby-hel1: you don't shell out to curl. You use open-uri: require 'open-uri'; my_ip = open("http://ifconfig.me", &:read)
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<certainty> what the hell, why do you shell out to curl?
<certainty> jhass: see xD
<ruby-hel1> jhass: thanks for your suggestion, how would you then put logic to the output of the ip address?
<jhass> certainty: at least!
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<jhass> ruby-hel1: I would start by defining what logic I need
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<certainty> what the hell, why do you have to put logic to the output?
<certainty> hmm maybe that doesn't always work
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<shevy> what the hell, why is his problem still not solved
<ruby-hel1> i have an an api that uses curl that will output me the staus of ipsec tunnels. Therefore in order to know whether the tunnel is 'active' or 'down' etc i need to understand how i can put some logic into the output of a curl command.
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* jhass has a deja-vu
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<ruby-hel1> i dont have access to the system from where i am but i can understand the logic of it by using the curl ifconfig.me example
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<jhass> is that some interview question or something?
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<shevy> ruby-hel1 see - you run the command through ``. now you have all the result in that variable
<shevy> ruby-hel1 go do: puts ip
<certainty> those sentences could have been generated by a markov chain as well
<shevy> lol
<jhass> shevy: I thought we have been through this
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<jhass> you don't shell out to curl
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<certainty> curl shells out to you
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<shevy> jhass: it is entirely irrelevant
<wasamasa> curl shells out through you
<shevy> if it works it works
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<jhass> shevy: perl works too
<certainty> and if it doesn't, go to lunch
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<shevy> yes go to #perl if you need it then
<cajone> curl curls round you
<jhass> shevy: go to #shell if you need it then
<shevy> jhass: what for?
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<jhass> I ask you? you're the one who wants to shell out
<shevy> jhass: I don't "want" anything - I am stating that his use case is a perfectly legit one.
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<certainty> ruby-hel1: the general idea is, you try do encode your "logic" in some working ruby code that can deal with the what ever your other end gives you (be it curl or something else)
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<certainty> yo do realize that shell is onely one s away from hell?
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<jhass> ruby-hel1:
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<jhass> can you clear up my deja-vu?
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<jhass> and ruby is only a g away from rugby
<ruby-hel1> certainty: ok thanks but isnt that what im doing ?
<godd2> I'm confused. If the call to curl returns some string, what does it matter?
<certainty> ruby-hel1: i don't know. i was under the impression that you tried to find out how you can access the information you want from ifconfig.me
<shevy> godd2 yeah I wonder the same
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<shevy> ruby-hel1 did you inspect your variable ip yet?
<jhass> godd2: you spawn a useless process while there's a perfectly fine way to not do that
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<jhass> your script gets an external dependency on curl while there's a perfectly fine way to avoid that
<ruby-hel1> it matters because if the tunnel is 'down' i want the output to tell me its down if its deemed as 'up' i dont care if theres a problem then i want to know about it
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<shevy> ruby-hel1 did you inspect the output of your variable ip yet
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<certainty> and therefor your program won't work on systems that don't have curl installed
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<certainty> also you have to deal with how your OS finds executables and where they reside
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<ruby-hel1> shevy: what do you mean
<ruby-hel1> ?
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<shevy> ruby-hel1 you used backticks right?
<shevy> ruby-hel1 do you know why you used backticks
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<godd2> so then as long as his code ever runs in an environment that will run curl correctly, then this is a "perfectly fine way" to do it, no?
<certainty> and not so long back you might have spawned a bash. depending on your control over the environment that might have been bad :p
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<apeiros> godd2: every dependency is fine if the code in question will always only ever run in an env satisfying those dependencies. so all code is "perfectly fine", no?
<godd2> I would wager that the purpose of this code was to understand something about doing an if statement, not about putting curl calls into production
<shevy> jhass and certainty want the code to be perfect
<shevy> so they want to get rid of ``
<godd2> apeiros the alternative is that no code is ever perfect since it depends on an runtime environment
<certainty> godd2: well, my experience tells otherwise
<shevy> but I think getting rid of `` is actually best because ruby-hel1 does not know what `` does
<certainty> godd2: i've seen code that is even worse in production
<jhass> godd2: if it's code that should teach you something it only makes it worse, as we've explained it's bad pratice. You shouldn't teach bad pratice
<jhass> that the main subject is something else doesn't matter
<shevy> I find it a perfectly valid use case to use ruby as a glue language
<apeiros> godd2: false dichotomy
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<certainty> i can't even spell that
<apeiros> godd2: every dependency increases the burden
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<apeiros> every dependency you can get rid of without increasing complexity is an insta-go.
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<ruby-hel1> shevy: to call the curl command no /
<ruby-hel1> ?
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<shevy> ruby-hel1 yes, but you could use system() too
<ruby-hel1> right so which one is better.
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<shevy> ruby-hel1 the whole point of using `` is because you get an output into your variable
<shevy> but in your code you do not make use of that output
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<ruby-hel1> im aware there are good practices, bad practices, the right way the learning way and way that for the time being just works. im just trying to get this to work based on an ifstatement
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<shevy> ifstatement
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<shevy> what condition do you want to check?
<shevy> if input == "1.2.3.4"
<shevy> whether your string there includes this?
<shevy> if ip.include? "1.2.3.4"
<ruby-hel1> i dont have any idea of the politics of what is best practice or not, but from myperspective somethign working is better than not working as it was the wrong way of doing it
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<jhass> ruby-hel1: I've seen the exact example with the exact problem statement before. Are you the same person and just didn't make any progress since or is that something that should teach you something
<ruby-hel1> the ipaddress value i want to check
<shevy> yes; both ways work.
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<shevy> ruby-hel1 ok so as written above: can you tell me what the ip variable will contain precisely?
<jhass> I guess I'm on his ignore list by now
<ruby-hel1> 1.2.3.4
<rpag_> IPAddr?
<shevy> ruby-hel1 ok good, if this is true what you just wrote, then if ip.include? "1.2.3.4" will work
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<shevy> jhass nah, I think he is just slower than we are
<jhass> I've asked this like 3 times before
<shevy> typing speed on IRC
<certainty> jhass: fair enough from what i can tell we're almost all on his/her for some time now :)
<shevy> I asked a similar thing too three times!
<shevy> it's the 3x rule for ruby-hel1
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<godd2> certainty I think you accidentally a word
<shevy> you have to type it out 3 times
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<ruby-hel1> these comments arent helpful
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<shevy> :>
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<rpag_> >> require 'ipaddr'; IPAddr.new("1.2.3.4")
<eval-in__> rpag_ => #<IPAddr: IPv4:1.2.3.4/255.255.255.255> (https://eval.in/221864)
<ruby-hel1> im trying to understand, taking the piss doesnt help anyone
* certainty is trying to understand as well
<certainty> are we talking about how conditionals work?
<ruby-hel1> i have in fact explained what im trying to achieve numerous times now
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<jhass> doesn't mean we will just give you the solution
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<jhass> I don't have the impression you want to learn, so I'm out
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<ruby-hel1> im trying to understand but its very diffcult to pick it up in 15 minutes
<shevy> ruby-hel1 but the solution is there; if your variable includes "1.2.3.4" you enter the first if clause, else you enter the other clause
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<ruby-hel1> shevy: where would i put the first if clause, before the 'rescue Exception' line ?
<shevy> what rescue Exception
<shevy> are you looking at something that I can not see
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<ruby-hel1> i was lookign at this https://eval.in/221864
<ruby-hel1> posted earlier
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<ruby-hel1> sorry waht were you reffering to ?
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<shevy> you have to ask the guy who told you this code
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<shevy> it was not me
<ruby-hel1> ah ok my apologies
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<shevy> ruby-hel1 that part: <shevy> if ip.include? "1.2.3.4", to this code: https://paste.ee/p/AKLtg
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<shevy> by the way you should be consistent with your indent
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<certainty> i've lost track
<shevy> line 6 has not the same indent level as line 8
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<ruby-hel1> like this ? https://paste.ee/p/CEcoo
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<shevy> well this is better
<shevy> but (1) the indent is still wrong, and
<shevy> (2) you use gets - we established that you won't need gets an hour ago, yes? so get rid of that line
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<godd2> ruby-hel1 do note that since ruby is whitespace agnostic, the indentation doesn't make the code do anything wrong.
<ruby-hel1> so its just for eay readin is it ?
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<ruby-hel1> easy reading*
<certainty> oh boy
<centrx> Bad indentation makes you do something wrong, but not the code
<godd2> ruby-hel1 yes (with a few caviats)
<ruby-hel1> when i take out the gets.chomp i now get this
<ruby-hel1> ./test.rb:6:in `<main>': undefined local variable or method `input' for main:Object (NameError)
<godd2> ruby-hel1 thats because you're referencing the input var later on
<jhass> ruby-hel1: did you do a basic ruby tutorial yet?
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* certainty hopes that ruby-hel1 deals with that ipsec thing only for fun
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<ruby-hel1> ive done most of codecademy.com
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<jhass> did you actually try to understand it or did you just make the examples pass?
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<ruby-hel1> it mostly makes sense
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<jhass> because then you should be able to make sense of that error message
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<godd2> jhass, shevy and I are happy to help ruby-hel1 without blasting him with questionable normative statements.
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<ruby-hel1> i do appreciate all of your help here guys. i know it must be frustrating
<centrx> Ruby good
<jhass> he still has the "move on if it works" attitude. You only support it. If you think that's helping him in the long-term...
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<ruby-hel1> i see the problem, i did know this as i called the curl line input before
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<ruby-hel1> 'input'
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<ruby-hel1> i changed it to 'ip'
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<godd2> well what I think won't help him is telling him he should know something when he doesn't
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<godd2> I jsut don't want you to get an aneurism trying to help jhass :P
<certainty> [[ $(curl -sk ifconfig.me) == *1.2.3.4* ]] && echo "yes"
<jhass> sorry, I shouldn't have implied the message behind it. It's "Go back to a basic ruby tutorial if you don't understand undefined local variable errors in 10 lines of code"
<ruby-hel1> any good places you would sugest to learn ?
<ruby-hel1> how did you guys learn ?
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<godd2> ah then we agree jhass :)
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<godd2> ruby-hel1 I got my first go with lynda.com video tutorials. but I'm a visual learner so its not for everyone.
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<ruby-hel1> yeah i torrented a copy form them
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<jhass> ruby-hel1: I didn't learn programming with ruby, so I don't have personal experience with the ruby stuff. Some did seem to succeed with the codeacademy stuff. if you have a few bucks to spare I heard good things about chris pine's "Learn to program"
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<certainty> good books do help
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<certainty> get a copy of SICP
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<certainty> then learn any language you want
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<godd2> ruby-hel1 for books, check out Practical Object-Oriented Design in Ruby, and Metaprogramming Ruby (my choices anyway)
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<godd2> and of course, be patient. learning a language doesn't happen overnight or even in a month :)
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<certainty> at least not in the beginning
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<jhass> yeah, doesn't sound like beginner books
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<certainty> scared him away
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<ruby-help> thanks againg forall your help and advice
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<atmosx> hm
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<shevy> hey atmosx
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<atmosx> shevy: whats up
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<MattB2> Would it be fair to assume that somehash.first[0] is more efficient thatn somehash.keys[0] to get the first key of a hash?
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<MattB2> *than
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<jhass> do you have a bottleneck on that code?
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<godd2> MattB2 I don't know if assuming it's faster is fair, but after benchmarking it looks like it's about 2x faster
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<MattB2> jhass: no, just wanted to be efficient up-front. .keys[0] reads more clearly, but I assumed is extracting an array of keys, then picking the first, where .first[0] is taking the first entry, then picking the key.
<MattB2> godd2: thanks!
<jhass> MattB2: google premature optimization
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<MattB2> jhass: I wouldn't exactly call wanting to use clean efficient code premature optimization. :)
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<jhass> you have working code. You spend at least half an hour on optimizing it. That's about the definition of it
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<godd2> jhass oh so NOW it's okay if code is working :P
<MattB2> Exactly, so knowing which of these two commonly used operations is more efficient, and using that from now on cost me little to learn, and nothing to implement (ok, one extra key press :)
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<jhass> godd2: since you have that benchmark ready, I'd be interested how it compares to .each_key.first
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<godd2> jhass looks like its between the two
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<godd2> disclaimer: these are not scientific results
<jhass> mmh, .each_key {|k| break k } ? :P
<wasamasa> guys
<wasamasa> just use code that's readable, working and conveys the meaning well
<MattB2> jhass: yeah, I"m gonna use that from now on. <g>
<wasamasa> if there's any performance problems, add ugly optimization hacks
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<jhass> MattB2: you wanted the fastest one
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<jhass> the pretty one IMO is .keys.first
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<MattB2> jhass: yes, that reads best.
<godd2> jhass .each_key {|k| break k } is the fastest
<jhass> not that I like depending on the order of a hash in the first place
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<godd2> its about 30% faster than first[0]
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<wasamasa> godd2: scary
<jhass> it avoids any allocation
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<wasamasa> let's bribe someone with commit rights to make the fast one slow and the pretty one fast
<godd2> wasamasa we could probably pay tenderlove in puns
<MattB2> jhass - order doesn't matter in this case - just need to determine the Class of the key
<jhass> mmh, no duck typing?
<wasamasa> godd2: isn't he the guy who made nokogiri?
<wasamasa> godd2: and did a talk about bad ideas?
<shevy> atmosx dunno, not much; watching boring lectures, reading through some chemistry crap, and training calculations of all sorts
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<MattB2> jhass: I need to convert the keys to another format if they're not what's needed, so just testing somehash.keys.first.is_a? does the job (unless I"m missing a trick)
<atmosx> shevy: I didn't study jack shit todya. I don't know how am I gonna pass this exam. I'll beg him on my knees or something. There questiosn I can answer but those are not many.
<wasamasa> godd2: yup
<shevy> atmosx ah don't worry, just make sure you are absolutely certain that you can answer the questions you can answer
<jhass> MattB2: for core classes you could unconditionally convert, Array#to_a #=> self, String#to_s #=> self and so on
<shevy> I speculated often for many exams, for most it worked. for some it did not haha
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<atmosx> shevy: well kinda
<shevy> get better in these!
<shevy> then add one more and stop learning until the exam
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<shevy> atmosx how often can you repeat it anyway?
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<atmosx> shevy: I can repeat it in 10 days
<atmosx> shevy: but that's not the issue, the problem is that if I don't pass this I can't prepare for the state exams on 9 or 11/12
<cajone> I don't get this, 0.class => Fixnum ; puts "Hello 0" if 0 => nil but prints "Hello 0", so why does a Fixnum eval to a boolean => true, is it because 0 is instantiated as a Fixnum object and the if clause is returning the result of an existence test? , and if this is the case would it not reasonable to expected at least a warning like "Fixnum literal in condition" , no ?
<atmosx> shevy: because if I lose more time studying this thing won't be enough time to study the other 4 ...
<MattB2> jhass: So what would that look like for: dates = Hash[dates.map { |k, v| [k.strftime, v] }] if dates.keys.first.is_a? Date where dates is an array of Date keys?
<MattB2> * where dates is a hash with Date keys?
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<shevy> atmosx ah I see why you want it
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<shevy> atmosx is there no way to assess how much more you'd have to learn or know? as in to reach a certain quota of points to pass?
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<jhass> Date is no core class ;) But since you want string keys you would just always do to_s
<atmosx> shevy: If I were alone with the prof I'd tell him, but we'll be like 10 ppl.. otherwise If I felt the heat I'd go begging seriously, I don't wanna come back :-(
<atmosx> shevy: it's oral
<jhass> and in this case Date#to_s == Date#strftime without arguments
<atmosx> no points
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<jhass> so that even does what you want
<atmosx> shevy: a guy was ditched the other day because (supposedly) he didn't know the difference between dextrin and dextran
<atmosx> shevy: which is kinda subtle difference...
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<shevy> damn
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<atmosx> shevy: but I'm usually better than those guys, I mean I'm pretty good at pharmacology (so I know dextran is used as an anti-thrombotic) but didn't knew that it had α-1,3 glycosidic bonds instead of α-1,4 ... whch is shit if you ask me
<shevy> atmosx well do you know the difference? :-)
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<atmosx> dextrin is used as glue, the other one as antithrombotic that's what he wanted to hear probably. Ther'es a different in the number of glucose units too.
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<shevy> I would not have known it; the 1,3 vs. 1,4 difference is however is a very comman theme in sugar biology (starch, glykogen, maltose etc..), also alpha vs. beta difference there
<shevy> aha
<shevy> that still sounds better than shikimate
<MattB2> jhass: so they way I did it is the right way to do it? (for some definition if right)
<atmosx> well yes
<atmosx> alpha vs beta is easy
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<atmosx> I mean, it's what you expect to get asked
<jhass> MattB2: it certainly works. It's not duck typing though
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<shevy> atmosx is it possible to start chatting away about a topic and lead him into subjects you know very well?
<atmosx> innulin vs glucose/fructose/etc
<atmosx> shevy: I hope it is.
<shevy> hehe
<atmosx> shevy: not because he is stupid but becasue I think he will be kinda cool, it's my last fucking subject.
<shevy> some professors are helpful, some are asses
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<MattB2> jhass: then I'm obviously not understanding how to apply "Date#to_s == Date#strftime without arguments" to this use case.
<shevy> atmosx ah you'll do fine! learn one more exam question today and that was it!
<jhass> >> require 'date'; Date.new.to_s
<eval-in__> jhass => "-4712-01-01" (https://eval.in/221927)
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<jhass> >> require 'date'; Date.new.strftime
<eval-in__> jhass => "-4712-01-01" (https://eval.in/221928)
<jhass> same thing
<atmosx> shevy: the funny thing is that I'm giong to be a pharmacist and no one is going to ask me about ... how the biosynthesis of alkaloids is done... I mean wtf am I learning.
<jhass> you want string keys, so you convert your input to strings
<godd2> It was the year negative 4712...
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<shevy> atmosx god... one question I had half a year ago was about alkaloids... 10 points... I think I reached only 1 or 2...
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<jhass> that's duck typing, you just assume your input responds to the right thing, you let the caller the freedom to decide what to pass
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<atmosx> shevy: what question?
<atmosx> shevy: do you remember?
<atmosx> what was the q?
<shevy> atmosx let me try to find it ... I think I noted them down
<atmosx> haha cool
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<shevy> atmosx oh yeah, it was divided into 3 parts: (1) draw + explain structure of alkaloids (2) give examples (3) which aminoacid provides the starting (or main) point in the biosynthesis of alkaloids? (A problem was that the one who asked the question was a plant biochemi, and I hate plants...)
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<MattB2> jhass: ah, I'm with you now - I can put to_s on the caller, so no need to convert up front. Duh, now I see where you were driving.
<MattB2> Thanks!
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<jhass> mmh, not exactly what I meant
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<jhass> it somewhat applies, in that you now assume that your input looks like a string
<jhass> as opposed to just assuming that it has a method to get a string representation of it
<atmosx> shevy: ok (1) is easy, but which structure? You have those which the nitrogen is inside the ring and the phenyl-alanine derivatives (epinephrine, norepinephrine, dopamine, etc.) which is outside... (2) is easy already did :-P (#) easy again
<atmosx> already did :-P
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<shevy> well
<atmosx> actually alkaloids that start from lysine, tryptophan, ornithine
<shevy> that would have been the difference between 2 points and 8 points I guess
<atmosx> pnehyl-alanine, tyrosine
<atmosx> and ... histidine IIRC
<shevy> hey I have absolutely no idea and the best thing is - I did not look it up either because I hate it so much
<atmosx> I feel you
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<shevy> I don't want to know it either! I could have a chart map that shows all compounds anyway, and in the end it's the DNA that willg overn which enzymes create all the compounds anyway
<atmosx> when I was in high school, I got ditched 1 year over chemistry. Had to re-do an exam on september in order to pass the class
<atmosx> otherwise I would had to repeat the entire year, I was so scared I learned the book by heart
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<shevy> atmosx btw is this really pharmacy? because you were doing some computer work before there?
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<atmosx> but I never really understood anythng, now at least things start to come together (I know the life of an alkaloid from plant to drug to side effect to excretion... urine or something)
<shevy> excretion is better, it's fun
<atmosx> shevy: My thesis is about bio-informatics but nothing special
<MattB2> jhass: as convoluted as it sounds, some later methods call Date#parse on the datestring, and you can't call Date#pare on a date, but if I add to_s it works
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<atmosx> shevy: the rest man, I don't know ... :-( just hav to know these things to get the degree and go home
<shevy> atmosx ah ok, thought there was like mandatory bioinformatics components in pharmacy now
<jhass> MattB2: that sounds indeed very convoluted
<jhass> is there at least some serialization (persistence, network) involved?
<shevy> here, pharmacy is all plants and chemistry - basically nothing about computers (and they don't even have a master's programme; it is still an old diploma study)
<atmosx> shevy: ah no
<atmosx> shevy: I'm the first person in my univ to even remotely touch the subject.
<shevy> hehehehehe
<shevy> you are a pioneer!
<atmosx> hahaha well kinda
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<MattB2> jhass: different ActiveRecord database adapters return date keys for .count in either Date or String format. The rest of the code asssumes datestring keys (and in some cases manipulates the string directly, so datestring keys aren't always a disadvantage). Either I convert the Date keys to datestrings up-front, or I change the rest of the code to append .to_s, or I invert the rest of the code to expect Date keys.
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<jhass> I'd figure out what most of the adapters do, then convert the other adapters to that behaviour
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<MattB2> Yeh, I'd started with sqlite as the lowest common denominator (datestring keys), but in hindsight...
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<MattB2> jhass: Anyway, wouldn't changing it now be premature optimization? :-P
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<jhass> I'd argue that premature optimization is about details and this is about application design
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<jhass> but yeah, if you have it working currently, don't make it a top priority
<jhass> put it into the refactoring slot
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<MattB2> jhass: just what I was thinking :)
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* Nilium finally gave in and licensed RubyMotion.
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<centrx> >> 'ha' * 5
<eval-in__> centrx => "hahahahaha" (https://eval.in/221950)
<centrx> >> 'lo' * 4
<eval-in__> centrx => "lolololo" (https://eval.in/221951)
<centrx> >> HA = 'ha'; HA * 4
<eval-in__> centrx => "hahahaha" (https://eval.in/221953)
<centrx> >> (['l'] * 4).join('o')
<eval-in__> centrx => "lololol" (https://eval.in/221954)
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<MattB2> centrx - there's always irb (or pry)
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<centrx> Only IRC has LOL functionality
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<shevy> I LOL in reallife
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<gnu_d> Hi, is there a proper terminology for the following code: class String: def something_new, I'm comparing language features ?
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<gnu_d> the above code will add a new method to the builtin String class, but I don't how's that called
<shevy> gnu_d you simple define a method on class Strings; all Strings will have this; the negative term is "monkey patching", the positive term is "knowing precisely what one is doing"
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<gnu_d> shevy: I'm looking for a term like class, method overriding or something, but I don't think that's the proper one
<shevy> method overriding?
<shevy> what method are you overriding in your example?
<gnu_d> shevy: not overrinding, instead I'm adding a not existing method in the Strings class
<gnu_d> overriding*
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<shevy> yeah
<shevy> monkey patching is the common one
<gnu_d> shevy: I thought you were joking :D
<gnu_d> was*
<gnu_d> sorry, my head isn't straight today, can think properly
<gnu_d> can't*
<shevy> I did not make up the term
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<shevy> I don't like it either
<shevy> it's a feature - you can, if you want to, modify core aspects of ruby
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<shevy> the bug is that you can not cleanly undo or restore prior conditions (in regards to core/stdlib of ruby)
<centrx> gnu_d, What it means is that Ruby is fully object-oriented, so even all the base data types can use the features of classes
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<centrx> gnu_d, And one of those features is the ability to "open up" a module or class and add more things to it in various files
<jhass> gnu_d: as shevy says "monkey-patching" is the negative term, the neutral term is "open classes" or "open class model"
<shevy> I like opening up
<shevy> it reminds me of X-mas
<shevy> I open presents and bags
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<gnu_d> I see, I'm comparing it to Python, I really like to see how they compare in that level.
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<shevy> dunno
<centrx> The negative term for Python is "not object-oriented"
<shevy> do you modify classes in python at runtime gnu_d?
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<gnu_d> shevy: I never tried it before :(
<shevy> I remember years ago on #mono.de or so
<centrx> The German kissing disease?
<shevy> people shouted "that fucking stinks! someone else could modify stuff and break my code!" in regards to opening up core classes
<shevy> they hated ruby
<shevy> centrx Germans don't kiss
<shevy> they are too disciplinized for this
<gnu_d> shevy: I just like more control :), so I can build much more sophisticated things
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<bl4ckdu5t> irb is like python interpreter they said, I find it not to be true
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<bl4ckdu5t> I've been progressing with learning ruby as a python developer and I try to use irb but sometimes my variables just lost
<bl4ckdu5t> foo = 'hey'
<bl4ckdu5t> next minute I do foo or puts foo
<bl4ckdu5t> I get nothing
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<centrx> Are you sure it's the same console? Restarted irb?
<shevy> bl4ckdu5t if you assign to a variable in irb and it keeps on running then the above code works
<bl4ckdu5t> I always have to restart it
<apeiros> bl4ckdu5t: um, variables don't suddenly get lost. maybe you're confusing contexts? local variables are local to their scope. e.g. `def foo; bar = 'hey'; end; bar # will not work, since bar is local to the foo method
<shevy> on a restart it is a new instance, the old local variables are lost
<apeiros> bl4ckdu5t: *why* do you have to restart it?
<MattB2> jhass: decided no time like the present, and converted to Date from top-down. The world is a better place. :)
<bl4ckdu5t> I think it's just buggy on my machine
<bl4ckdu5t> It happens and when I quit out of it and start over, it works fine
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<bl4ckdu5t> I started thinking it is a common thing with irb
<apeiros> bl4ckdu5t: what is "it" in "it happens"?
<apeiros> I'm almost certain that you're misunderstanding some cause & effect there.
<bl4ckdu5t> The buggy nature of irb
<apeiros> gah
<apeiros> DUDE
<shevy> perhaps he has a heisenbug irb
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<apeiros> it's NOT buggy
<apeiros> and unless you give us some actually useful information, we can't tell you what you misunderstand
<Nilium> gnu_d: Might be considered a class extension, would probably be considered a mixin if you stuffed it in a module and then added it to the string class, but monkey-patching is generally what it is
<atmosx> buggy buggy buggy
<Nilium> Oh, scrolled up, go figure.
<MattB2> bl4ckdu5t: bugs or no bugs (and I'd side with apeiros on that one), pry is infinitely better.
<jhass> bl4ckdu5t: try pry, it's rubys ipython, maybe it works better for you
<Nilium> I dub bl4ckdu5t a troll
<apeiros> yes, pry+1. but whatever he doesn't get will happen all the same to him in pry.
<jhass> ah, too slow :)
<MattB2> apeiros: fair point
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<MattB2> jhass: what, pry?
<jhass> yeah
<jhass> and yay re the other one ;)
<Nilium> I remember having some issues with pry not wanting me to use certain one-letter variable names, but I don't think that's the case anymore.
<gnu_d> Nilium: I can see other ways, but I just wanted to know what's this thing as a feature
<MattB2> I nly use it for code tinkering, so never been a problem.
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<MattB2> *only
<jhass> Nilium: no I still have these unfortunately
<bl4ckdu5t> I think what happened exactly was I tried to use the new hash style rather than the rocket style
<jhass> but then single letter variables
<jhass> bl4ckdu5t: that doesn't relate to local variables
<MattB2> jhass: see my comment above re Date - took your advice and much better for it!
<Nilium> Yeah, but I'm ok with single-letter variable names if I'm just typing out some junk in pry to do a quick computation
<apeiros> bl4ckdu5t: how about you just gist a whole irb session and tell us in which lines something happened not the way you expected it?
<bl4ckdu5t> and instead of showing an error, it started behaving strangely
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<shevy> atmosx wat
<shevy> atmosx are you learning for the exam :-)
<bl4ckdu5t> it stopped storing local variables
<Nilium> like i=[*0..5].map.whatever.fishsticks
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<bl4ckdu5t> I should give pry a try
<Nilium> I expect nobody to judge me for my Enumerator#whatever and Enumerator#fishsticks extensions
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<shevy> Nilium fishsticks method so I see
<shevy> whatever is ok
<shevy> but fishsticks...
<shevy> what's next
<shevy> .pizza?
<Nilium> Fishsticks is basically a parallel map and fold followed by a sorted group-by
<shevy> lol
<Nilium> It made sense at the time.
<Nilium> After the bottle of wine
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<shevy> fishsticks -> http://goo.gl/P9aPxO
<shevy> I can't see the fish in there anymore :(
<ericwood> .pizza is about to be a TLD
<ericwood> I'm eagerly awaiting it actually
<shevy> you guys make me hungry
<Nilium> Coworker of mine was thinking about registering a .ninja domain.
<Nilium> I prefer to just get .net domains
<shevy> what do ninjas eat?
<Nilium> Like hooker-with-a-penis.net
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<Nilium> Which I already registered, so apologies to anyone who wanted that
<apeiros> Nilium: he really just wants invisible.ninja, right?
<shevy> ninjas with a penis?
<Nilium> apeiros: I think he just wanted one for his name
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<ericwood> I actually bought a frozen pizza that is being cooked as we speak
<ericwood> I did this because I saw a pizza ad on the tiny TV in front of my treadmill
<ericwood> :(
<shevy> ah well
<shevy> they are awful
<centrx> Paul Newman makes a fine frozen pizza
<shevy> most frozen stuff is just cheap mass production
<centrx> Paul Newman hand-kneads every pizza that carries his name
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<shevy> that dude is dead
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<centrx> That makes it all the more miraculous
<centrx> What a fine and miraculous pizza
<ericwood> diggiorno or whatever has good ones
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<MattB2> Fresh dough, thin crust, BBQ sauce, chicken breast, red onion, green pepper, red chili. Best. Pizza. Ever.
<ericwood> only two minutes left on this, idk if I'm going to make it :(
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<shevy> #ruby - where you always get the latest news about the latest cuisine ready
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<centrx> >> 8.pizza?
<eval-in__> centrx => undefined method `pizza?' for 8:Fixnum (NoMethodError) ... (https://eval.in/221962)
<centrx> >> "pizza".pizza?
<eval-in__> centrx => undefined method `pizza?' for "pizza":String (NoMethodError) ... (https://eval.in/221963)
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<shevy> cool
<shevy> pizza even got a history http://en.wikipedia.org/wiki/History_of_pizza
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<olistik> hi guys
<MattB2> hi
<olistik> I'm looking for a markdown to html converter
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<olistik> what's your best choice?
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<olistik> I looked over github-markdown but I need to change something about the generation of code blocks and it looks the repository doesn't contain the source code ^_^'
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<jhass> redcarpet has a fairly easy way of writing custom renderers
<olistik> @MattB2 thanks for pointing out that resource :-)
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<olistik> jhass: I'm going to try kramdown and redcarpet, then :-)
<jhass> https://www.ruby-toolbox.com/categories/markup_processors some more choices (not all markdown)
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<wald0> is there any new good ruby book made in the last 1-2 years that i should be aware of ?
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<shevy> not sure
<havenwood> wald0: well grounded rubyist, second edition came out