ljarvis changed the topic of #ruby-lang to: RIP Jim Weirich || Ruby 2.1.0; 2.0.0-p353; 1.9.3-p484: http://ruby-lang.org || Paste >3 lines of text on http://gist.github.com
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<noober3>
i am a total noob to ruby, was wondering is the unless keyword used frequently? it just seems weird
<ohsix>
it's just some sugar to invert and move a test for something, you can do if(!thing) y=whatever, or y=whatever unless thing
<centrx>
noober3, It is commonly used
<centrx>
Improves readability
<noober3>
ok just use to ! so unless just looks funny to me, but i guess i must change my ways
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<ohsix>
there are a surprising number of predicate situations where it looks better, chains of if and inverting stuff get kind of boring
<lianj>
if you want to make readers mad use `if not foo`
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<noober3>
what is the best tutorial on how to program in ruby? i am currently reading the wikibooks on ruby
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<centrx>
noober3, I do not know what is the best tutorial for a "total noob", but the Pragmatic Programmer's Guide (the Pickaxe) is the standard best guide/reference http://pragprog.com/book/ruby4/programming-ruby
<centrx>
noober3, That might be good if you are already familiar with programming in general
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<michael_mbp>
rather unclear on what the process is on maintaing a gem for multiple rubies, anyone?
<michael_mbp>
along with semver that is.
<michael_mbp>
do I throw 1.8.7 support into a different branch?
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<Sirupsen>
michael_mbp: You could check the RUBY_VERSION inline, but it's sketchy.
<michael_mbp>
Sirupsen: yeah, thing is I made a module for a payment gateway whilst supporting an older 1.8.7 app
<michael_mbp>
but I want to release it supporting 1.8.7 and 2.0
<Sirupsen>
michael_mbp: What's different between the two versionins?
<michael_mbp>
so typical development you'd start at v0.1.0 and at somepoint transition to a newer ruby.
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<michael_mbp>
Sirupsen: well, once I factor in specs n' stuff, I'm guessing those dependencies would vary depending on the version of ruby I'm testing against.
<centrx>
michael_mbp, Personally, I would have one active version that supports both Ruby versions
<michael_mbp>
centrx: so, check the ruby version inline?
<centrx>
michael_mbp, There are not massive differences between the versions of Ruby. There is a large, almost all-encompassing intersection of features that works on both.
<michael_mbp>
I haven't looked yet but I'm assuming the current stable release of RSpec wouldn't be the same version availabe for 1.8.7
<michael_mbp>
centrx: that's true.
<michael_mbp>
my current code would most likely run on both.
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<Sirupsen>
From what I'm aware of, there's not a way to specify gem versioning depending on a Ruby version in rubygems. You might be able to get away with something super sketchy with a extconf.rb in ext/ and emulating a C extension where you can execute code to install a gem. But really, you're going down a crazy path... Anything wrong with specifying the latest, stable release of e.g. Rspec that supports both for now?
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<michael_mbp>
but I would most likley like to lock down the different development versions down, i.e. a version1 branch that's locked to 1.8.7
<centrx>
michael_mbp, That is typically done with branches in the source control repository
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<michael_mbp>
how about master, develop, 1-8-7-stable
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<michael_mbp>
thing is I like branches to reflect the semver progression
<michael_mbp>
similar to the way rails core works.
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<centrx>
michael_mbp, Why do you need to support 1.8.7 in the future versions of your software?
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<michael_mbp>
centrx: I'll dwell on this a bit, but I do like your idea.
<michael_mbp>
centrx: good point, unless the API changes.
<michael_mbp>
right now I'm supporting some older 2.x apps in production (eek I know).
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<michael_mbp>
It almost feels like the 1.8.7 version should be its own isolated gem.
<michael_mbp>
thoughts?
<michael_mbp>
if I plan for its API to still evolve over time.
<centrx>
You can keep your old version as a branch, you don't need to call it 1.8.7-stable, you can call it 1.5-stable or whatever your last version that supports 1.8.7 will be
<digitalknight>
there seem to be some problems in my yum install
<havenwood>
sudo yum install -y ruby-devel
<digitalknight>
i have filed a support ticket in my company already
<havenwood>
digitalknight: in order to install atomic you need to be able to build the c-extension
<havenwood>
digitalknight: you could use JRuby
<digitalknight>
havenwood: so I am missing atomic
<digitalknight>
hence I am in these problems?
<digitalknight>
havenwood: sorry,I meant automake
<havenwood>
digitalknight: you can't install atomic because you are missing build tools because your yum is broken so you can't install them, as far as i can tell
<digitalknight>
havenwood: so what do I need to install?
<digitalknight>
i shall ask support to install them
<havenwood>
digitalknight: Whatever you prefer.
<havenwood>
digitalknight: If you want to build ruby yourself: sudo yum install -y gcc automake gdbm-devel libffi-devel libyaml-devel openssl-devel ncurses-devel readline-devel zlib-devel
<havenwood>
digitalknight: or ruby-devel
<digitalknight>
havenwood: but I do have ruby
<digitalknight>
my ruby -v shows something sane
<havenwood>
digitalknight: the ruby and ruby-devel packages are different. having ruby and being able to build gems with c-exts are different matters.
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<digitalknight>
havenwood: so I am missing ruby-devel?
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<havenwood>
digitalknight: are you?: yum list ruby-devel
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<digitalknight>
havenwood: let me try
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<digitalknight>
havenwood: cant
<digitalknight>
yum is broken
<digitalknight>
havenwood: can it have anything to do with my ruby version?
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<digitalknight>
will specifying 'ruby 2.1.0' in my Gemfile make it work?
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<havenwood>
digitalknight: you are trying to install a gem that require build tools in order to build a c-extension
<havenwood>
digitalknight: the -devel package has dependencies on those build tools
<havenwood>
digitalknight: they can be installed independently
<digitalknight>
havenwood: right,so it doesnt have anything to with my ruby version specified in the Gemfile,is it?
<digitalknight>
thats what I will tell my boss
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<digitalknight>
he was saying that its because i specified an older version in the gemfile
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<havenwood>
digitalknight: i don't know what we're talking about here, but if about atomic gem not building because you lack build tools then ^
<digitalknight>
havenwood: i understand that
<digitalknight>
was just telling what my boss said
<havenwood>
ahh
<digitalknight>
yes the atomic gem isnt building with the errors i told you
<digitalknight>
so it says i need to install devel tools
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<imperator>
eventually rubygems will support meta information so you can include 3rd party devel stuff
<imperator>
i think that's the plan
<digitalknight>
well
<digitalknight>
i hope it works soon
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<digitalknight>
how can I see the ruby versions present on my system?
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<havenwood>
digitalknight: which -a ruby
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<havenwood>
digitalknight: for at least those in your path
<digitalknight>
havenwood: i am sure i have multiple versions
<digitalknight>
but that command shows only one
<digitalknight>
is there a way for me to see all through rvm?
<havenwood>
digitalknight: only one is in your PATH
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<havenwood>
digitalknight: are you using rvm?
<digitalknight>
havenwood: yes
<havenwood>
digitalknight: I guess you didn't answer when I asked if you used system Ruby. >.>
<havenwood>
I presumed.
<havenwood>
digitalknight: rvm list
<digitalknight>
havenwood: oh thanks :)
<digitalknight>
ok i see two
<digitalknight>
now the final ques
<havenwood>
digitalknight: The RVM channel is #rvm by the way, if you get stuck on RVM.
<digitalknight>
oh awesome
<digitalknight>
i should hangout there sometime
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<digitalknight>
havenwood: now to default use the latest one
<digitalknight>
do I do ruby '2.1.0' in my Gemfile?
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<havenwood>
digitalknight: i don't usually set a ruby version in my gemfile unless using heroku or some such reason. i'd suggest getting the latest rvm, making sure your rvm default is set how you'd like it, and checking with #rvm on RVM specific stuff if someone in #ruby or #ruby-lang doesn't know
<digitalknight>
havenwood: so rvm --use-default 2.1.0
<havenwood>
digitalknight: also review the RVM documentation
<havenwood>
digitalknight: that sounds right
<havenwood>
digitalknight: rvm get latest
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<digitalknight>
havenwood: thanks a ton!
<havenwood>
digitalknight: no prob
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<ruby-lang878>
test
<havenwood>
ruby-lang878: hi
<centrx>
Did the test work?
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<havenwood>
B+
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<ruby-lang878>
Sorry ,I am new to IRC so that I could not able to continue
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<freedrull>
why is rubygems.org black now
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<digitalknight>
folks
<digitalknight>
i cant seem to be able to change the prmary key of a record in rails scaffold
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<ljarvis>
digitalknight: #ror
<ljarvis>
they'll be able to help out more
<digitalknight>
ljarvis: thanks!
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<centrx>
( #rubyonrails )
<ljarvis>
that's the same channel
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<centrx>
#ror doesn't forward for me
<centrx>
He hasn't joined so I thought he might need some help
<ljarvis>
weird
<ljarvis>
does for me
<centrx>
#rails was closed recently and doesn't forward either
<centrx>
oh hmm
<centrx>
maybe it's because I'm already in #rubyonrails
<ljarvis>
well yeah :P
<centrx>
yup, that's it
<centrx>
Yeah, but it says * Cannot join #ror (Channel is invite only).
<ljarvis>
yeah it's actually a different channel
<ljarvis>
but forwards if you dont have access
<ljarvis>
I only use it because i cba to type
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<badeball>
how's the support for tcl/tk support nowadays? I just built 2.0.0 with ruby-build and it segfaults as soon as I require 'tk'
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<ljarvis>
im assuming bad then
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<ksevelyar>
hello! <3
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<gnufied>
maloik_: bro, I may be interested in becoming an sponsor
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<gnufied>
as in not me personally, but my company
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<maloik_>
gnufied: that would be amazing :-) did you find your way to the sponsor document ?
<maloik_>
It contains most of the 'facts' and numbers, but I'd be happy to go into detail on what you're looking for in a conference
<yorickpeterse>
does Arrrcamp feature a pirate ship?
<yorickpeterse>
please let there be a pirate ship :<
<maloik_>
there will be a boat party ? d oes that count ?
<yorickpeterse>
will it involve plundering Ghent?
<maloik_>
not on our watch, sorry ;)
<yorickpeterse>
:<
<maloik_>
we may organize boat trips too though
<yorickpeterse>
need to see how I can get my hands on the biggest pirate hat in town
<yorickpeterse>
as in, an actually really big one
<yorickpeterse>
and I need a parrot that randomly yells "ACTIVE SUPPORT QUAAAAAAA ACTIVE SUPPORT" at people
<maloik_>
lol
<gnufied>
maloik_: yeah found it. looks good.
<maloik_>
feel free to pm or email us if you have questions or you want to talk it over :)
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<ljarvis>
maloik_: so, you coming to brighton conf?
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<yorickpeterse>
random question, because my head is full of fuck: if I do `foo_bar | ruby some_script.rb`, will the output be written to STDIN of some_script.rb as a whole?
<yorickpeterse>
Looking for a way to do this on a per line basis, one that doesn't involve Open3
<yorickpeterse>
otherwise the rubbies won't scale
<apeiros>
yorickpeterse: I think not. Afair pipes write as soon as foo_bar flushes
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<apeiros>
yorickpeterse: but you can try that out easily… `ruby -e '10.times do puts "hi" sleep 1; end' | ruby -e 'while line=gets; puts line; end'` # or somesuch
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<apeiros>
oh, actually ruby doesn't seem to flush per line anymore…
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<_rgn>
is there a way to convert def png?(obj); obj.content_type === "image/png"; end to a lambda or something so that i can use similar to arr.filter(&png?)
* imperator
scrolls up, is surprised to see people still using tcl/tk
<apeiros>
_rgn: the problem is that &:png? will do item.png?
<mikecmpbll>
_rgn: of what type is obj?
<yorickpeterse>
imperator: my CTO recently discovered it and was like "OMG WTFBBQ THAT'S IN STDLIB??!!"
<yorickpeterse>
I tried to explain Tk is shit :<
<_rgn>
S3Object or something like that
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<imperator>
yorickpeterse, he got so excited he started a bbq?
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<ljarvis>
i love bbq
<yorickpeterse>
imperator: almost
<yorickpeterse>
we should have a Ruby BBQ
<yorickpeterse>
BBQ those Gems
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<yorickpeterse>
fuck, that actually sounds like fun
<maloik_>
that sounds like fun indeed
<maloik_>
do it
<maloik_>
DO EEEEEEET
<yorickpeterse>
or the Ruby potluck
<ljarvis>
brighton ruby are doing a bbq
<yorickpeterse>
D:
<yorickpeterse>
but there's no sun in the UK
<ljarvis>
then we bbq in the rain
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<toertore>
_rgn: filter(&method(:png?))
<yorickpeterse>
besides the newspaper
<ljarvis>
har
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<imperator>
bbq in the uk...just seems wrong
<yorickpeterse>
a weekend long potluck + talks & stuff, hmmm
* imperator
thinks of the deep south for good bbq
<yorickpeterse>
TO KICKSTARTER!
<imperator>
yorickpeterse, there you go
<yorickpeterse>
80 000 EUR plz
<imperator>
perhaps some bitcoins will help
<mikecmpbll>
there's nothing like the smell of a thousand bbqs at the first glimpse of the sun.
<imperator>
start mining today!
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<yorickpeterse>
I prefer Doggycoins
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<yorickpeterse>
Right, time to get the rubber glove and wrap up upgrading our last 1.8 app to 1.9
<yorickpeterse>
(and then straight to 2.1)
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<imperator>
i'm getting behind - i don't even know what the difference between 2 and 2.1 was, and now 2.2 is coming up
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<_rgn>
toertore: cool, that works. why doesn't my ruby have filter method?
<apeiros>
imperator: shiny new GC! and required kwargs
<mikecmpbll>
_rgn: no one's ruby does.
<imperator>
kwargs?
<yorickpeterse>
and refinements are no longer "experimental"!
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<asahi>
I'm doing a reverse DNS lookup on a large number of IP addresses using Resolv, but some of the lookups hang for 30-60 seconds, slowing the whole process down. is there a way to do this concurrently, so that even if a lookup hangs, I can continue doing other lookups?
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<yorickpeterse>
You can use threads
<yorickpeterse>
or fiburs
<asahi>
I read about threads, but it seems like it won't work? what this article says is…And if some thread happens to make a call to the operating system that takes a long time to complete, all threads will hang until the interpreter gets control back.
<yorickpeterse>
In MRI you have a GIL, so only one thread can truly run at once
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<yorickpeterse>
But MRI will properly deal with that when it comes to IO I believe
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<yorickpeterse>
If you want proper concurrency use Rubinius or Jruby
<apeiros>
Fiburs are awesome
<asahi>
i'll check out fiburs. thanks
* yorickpeterse
slaps apeiros around a bit with a large trout
* yorickpeterse
slaps apeiros's bottom and grins cheekily
<benlovell>
moar fibur!
<yorickpeterse>
for extra measure
* apeiros
is shocked
* apeiros
feels sexually assaulted
<apeiros>
asahi: Fibur = Thread. it was a joke by tenderlove
<yorickpeterse>
( ͡° ͜ʖ ͡°)
<asahi>
ah i see
<yorickpeterse>
I swear to god one day somebody will use that
<yorickpeterse>
And then give a conference talk on how amazing Fiburs are
<ngw>
jhass, yorickpeterse, thanks for helping me out, the solution is that I should stop being an idiot :p
<apeiros>
ngw: huh? result = result.tr(/[Aa]/, '4') does not raise for you?
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<yorickpeterse>
oh?
<apeiros>
tr doesn't accept regexen… not even in 2.1…
<ngw>
basically I mv a source file but saved with vim with the old name, so one file was hijacking the other
<yorickpeterse>
lol
<ngw>
sorry, big project
* yorickpeterse
finds the closest large object and gives ngw a slap with it
<ngw>
:D
<ngw>
deserve it
<yorickpeterse>
WHY DOES IT STILL NOT USE THE FUNNIEST ONE
<yorickpeterse>
god damn it
<apeiros>
ngw: you can hugely simplify (and speedup) your numberize method
<apeiros>
ngw: def self.numberize(string) string.tr('AaEeGgIiOo', '4433661100') end
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<yorickpeterse>
Upgrading Rails while on beer
<yorickpeterse>
Best Fridays
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<yorickpeterse>
weird ass error though where 'should raise_error' gets effed up when you run the entire suite, but works fine when running the individual test
<asahi>
if let's say I a list of 2000 IP addresses. Is it okay to create a new thread to do a reverse DNS lookup on each IP address, or would that use up a lot of memory?
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<yorickpeterse>
You're better off using a controlled number of threads
<yorickpeterse>
e.g. a pool of 10
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<asahi>
yorickpeterse: you wouldn't happen to have an example of that would you? :-)
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<imperator>
havenwood, it's supposed to be more or less like the "file" command
<khaase>
can't tell if I'm being trolled in #ruby
<imperator>
so, /bin/ls should return true
<imperator>
but your approach would return false for /bin/ls
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<havenwood>
imperator: ahh, i see
<khaase>
yep, definitely being trolled
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<ljarvis>
khaase: if you're in #ruby, you're being trolled
<ljarvis>
the answer is always yes
<khaase>
haha, yes, I had like two years without IRC, I forgot all about that
<ljarvis>
wow i remember when you first started coming here
<chris2>
le khaase
<khaase>
haha
<khaase>
<3
<chris2>
hey
<khaase>
hi chris2
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<bjarki>
hi
<bjarki>
Is it okay to ask for help here?
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<havenwood>
bjarki: yes
<bjarki>
nvm found it on StackOverflow. my rvm --default was pointing at a none existing version.
<bjarki>
but thanks :)
<certainty>
khaase: does using method(:finalize) work for you seperately? I tests both your version and a version that returns a proc. And only the one returning the proc seems to work.
<havenwood>
bjarki: just for future reference there's an #rvm channel as well. ;)
<certainty>
*tested
<khaase_>
certainty: not work as in the tests don't run or are you using something else to test it?
<bjarki>
I'm so new to ruby :p did not understand why ruby -v was taking for ever to run end then returning an error
<certainty>
khaase_: i just created a minimal example that sets the finalizer and had it output something
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<khaase_>
certainty: what ruby version are you on?
<certainty>
khaase_: 2.1
<certainty>
mri
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<apeiros>
damn, some day this week somebody proofread some docs for me and I forgot whom :-S
<apeiros>
ljarvis: it's in the oven
<ljarvis>
that's a start
<ljarvis>
apeiros: wait, pizza is here made me think you got a delivery
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<apeiros>
no, I went to the store and bought a pizza
<apeiros>
and an energy drink
<ljarvis>
smart
<apeiros>
which I shouldn't have
<apeiros>
pizza deliveries around here take ages
<ljarvis>
how long is ages?
<apeiros>
and are silly expensive
<apeiros>
30-40min
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<ljarvis>
heh yeah same here
<ljarvis>
usually longer
<ljarvis>
sometimes 1hr+
<apeiros>
I'd probably refuse to pay at 1hr+
<ljarvis>
the pizza place is also like a 5 minute walk from my house, and they've taken that long before (yes, i usually walk there but there was once)
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<someperson>
if i have an array of arrays, and the first column is already ordered/grouped, is there a good way to loop through this array efficiently
<someperson>
i could do a while loop, but that's annoying
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<someperson>
would a .group_by here produce similar results or something?
<centrx>
"loop through"? What are you actually doing
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<apeiros>
you usually loop through an array using .each. but the rest of what you say makes me think something is missing from your description…
<apeiros>
probably has something to do with your unexplained mention of ordering and group_by…
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<someperson>
i have a DM query that has a 'group by moderator_id" that returns an array of structs, i want to iterate through the list without doing a Moderator.get(moderator_id) every time, i.e. cache it unless it changes
<_rgn>
poll: the best tool for executing a command when files are modified
<someperson>
_rgn: guard
* apeiros
hands ljarvis a slice
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<centrx>
someperson, There may be some eager loading functionality in DataMapper you can use
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<centrx>
someperson, In ActiveRecord it is called #includes
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<naquad>
i have a hash like {x: [1, 2, 3, 4, 5, 6]} how do i make [[:x, 1], [:x, 2], [:x, 3], [:x, 4], ...] from it?
<_rgn>
I have a script that downloads files and does things to those files. what would be the preferred way to achieve some type of parallelism, like keep downloading files while doing stuff?
<centrx>
naquad, hash[:x].map { |n| [:x, n] }
<naquad>
centrx, i don't know which keys are there
<jaimef>
ahhh, yeah, you might be stuck parsing ksyms in /dev/kmem
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<jaimef>
intersting idea. should make a lua kernel module to do that on netbsd
<agrinb>
hi everyone, my buddy told me that I can ask for help here. I'm a beginner, are there any "rules" for asking for help?
<imperator>
agrinb, pretty much just ask away
<jaimef>
just ask, don't paste more than a line, use pastie sites, showing code and explaing what you are trying to do helps most. don't ask to just ask.. the usual :P
<agrinb>
great, thanks
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<jaimef>
instance_variable_set is what I needed! instance variables support the lisp like construct
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* centrx
mentioned that an hour ago
<jaimef>
centrx: just saw that. thamks
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<jaimef>
the reason for not using the ENV hash is purely syntatic