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<jinette>
hello everyone, I am trying to tweak a site that is a Ruby on Rails app that is mostly based on SCSS, amazon_flex_pay gem, and a bit of CoffeeScript. it suggested heroku for deployment, so I've been using it since this morning. but I got stuck with adding some font files to embed in the site. after hours of css-focused wrestling, I was hinted that the font files might not have been on heroku at all. I am new to all this. could you help me know what
<jinette>
the problem here could be, and how I could solve it?
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<havenwood>
jinette: I think font files tend to not get included in the asset pipeline. I'd suggest checking with the #rubyonrails channel.
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<jinette>
havenwood, sure, I would go join there. do you mean I might not be able to add them at all?
<havenwood>
jinette: I vaguely recall you can append additional specific fonts or font file types in your Rails config.
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<havenwood>
jinette: The #rubyonrails channel is probably the best place to ask how.
<jinette>
havenwood, seems a great link, thank you!! 'The problem is, simply adding a fonts directory isn't picked up by the pipeline.' this is what didnt work in my case, either
<jinette>
havent tried yet, but seems just what I needed
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<havenwood>
hackeron_: Regexp match per char with the intersection of its optional arg Regexp deleted sounds interesting - but the per-char thing is odd.
<havenwood>
hackeron_: sorry MT
<havenwood>
shevy: ^
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<havenwood>
shevy: String#delete has been about globbing. How would the details work with Regexp? Is it worth proposing?
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<baweaver>
sub/gsub?
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<havenwood>
>> class String; alias old_delete delete; def delete arg; if arg.is_a?(String); old_delete(arg); else; self.gsub(arg, ''); end; end; end
<havenwood>
class String; alias old_delete delete; def delete arg; if arg.is_a?(String); old_delete(arg); else; self.gsub(arg, ''); end; end; end
<havenwood>
oops
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<havenwood>
but yeah, second optional arg
<havenwood>
have to decide how that'd work
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<havenwood>
(didn't mean to paste twice, silly code, relocating)
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<shevy>
havenwood well I just used .gsub but I was wondering why .delete does not want regexes
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<shevy>
havenwood yeah, perhaps there is a reason why it does not accept regexes. I don't want to suggest to ruby-core when it is likely to not get accepted anyway
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<havenwood>
shevy: the historical method takes globs for first and second arguments. Maybe there should be a String#scan_v, then it could function for the second arg of the Regexp version.
<havenwood>
shevy: but yeah, I get wanting to feed it regex
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<havenwood>
shevy: gsub
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<havenwood>
shevy: now String#scan_v is one to propose. :D
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<shevy>
did some poor person go through all of these!
<havenwood>
shevy: When you create a command line tool, that's the place to look to make sure you choose an existing option if applicable.
<havenwood>
shevy: Considering submitting a new --latest option for updating metadata without updating the tool itself.
<shevy>
hmm
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<zacts>
hi rubyists
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<shevy>
yo zacts the tacts
<zacts>
yo yo
<zacts>
=)
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<dx>
hi. i have some commandline tools like t or jekyll installed, and every time a major ruby upgrade happens (like 2.2->2.3) running their binaries breaks with Gem::LoadError
<dx>
am i doing something wrong or is this the intended behavior? i see the directories are versioned...
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<shevy>
dx so whatever it is on your system, the t gem could not be found
<dx>
the problem is that i had it installed for 2.2 (and also for 2.1, and for 2.0, and for 1.9), and every single time that a major ruby version was released i got that error and had to reinstall it
<dx>
the same thing for other gems that i stopped using it
<shevy>
yeah, the gems are usually installed in a directory for the respective ruby version
<dx>
so, is this pain in the ass the intended behavior?
<shevy>
for instance, I have ruby 2.3.0p0 and my gem dir is at: /Programs/Ruby/Current/lib/ruby/gems/2.3.0
<dx>
is there anything that can be done to make this suck less?
<shevy>
dx well, all gems are also kept locally in that directory
<shevy>
sure
<shevy>
collect all gems
<shevy>
gem install ./*.gem
<dx>
gotta catch em all
<dx>
how do i do that step?
<shevy>
yes, they are all in the cache/ subdirectory too
<shevy>
well locate that cache/ subdirectory first of your older ruby version
<shevy>
mine is at /Programs/Ruby/Current/lib/ruby/gems/2.3.0/cache/
<dx>
neat, that helps
<shevy>
53 gems are there; I also keep a local copy of all gems that I use... about 300 gems or so
<shevy>
btw, if you do not need to compile anything, you could possibly even just do a cp -rv (recursive copy) and it should work... but using .gem files is probably easier and more reliable
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<dkk>
hi
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<dkk>
i have an array a = [1, 2.0, 2] and i want to get the index of 2 using a.index(2) but i returns 1. Is there any way to get different indexes for 2 and 2.0??
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<[ace]>
a.index {|x| x.eql? 2 }
<[ace]>
=> 2
<[ace]>
>> a.index {|x| x.eql? 2.0 }
<[ace]>
=> 1
<[ace]>
not sure if it should be eql? or equal?, but you get the idea
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<dkk>
yes, will there be any efficiency losses or gains using this instead of a.index(2) ? I suppose a.index(2) also iterates over all the items and a.index {|x| x.eql? 2 } is also doing the same??
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<kirillzh>
Is there a way to check if string contains hours and minutes using Time or Date parser? For example "2016-03-13" doesn't contains hours and minutes whereas "2016-03-13 10:00AM" does.
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<kirillzh>
doesn't contain*
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<idletask>
Ox0dea: are you here?
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<flughafen>
hello everybody
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<mts_forever>
Hi...
<jhass>
hi
<mts_forever>
in ROR context , setting a mongoid model class with rails g model .... I get "field" keywords, where can I find documentation on this keyword?
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<tobiasvl>
mts_forever: on #rubyonrails
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<mts_forever>
ah thx
<jhass>
and in the mongoid docs of course
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<thevaliantx>
i am trying to get Ruby installed on Linux Mint 17, and two problems. #1 when I install the ruby package it's just 1.9.x ... #2 when I install using internet tutorials (ie, rvm), as root since sudo apt-get install is needed, nothing sticks. as soon as i close the terminal and re-open the terminal and run rvm it says that it's not found.
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<jhass>
you shouldn't install RVM as root, it's a lot harder to use in that mode
<jhass>
do you have a /usr/local/rvm already?
<hanmac>
thevaliantx: #1 check the software packages for newer ruby ... it should have packages for the 2.* too, you can switch them with update-alternative #2 if you add install rvm as user from https://rvm.io/rvm/install you need to add it to your .bash_profile as seen there
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<hanmac>
jhass: it depends, i use rvm as root, and it does work as it should too
<jhass>
yes but there are a few more loops to jump through which IME are too confusing to newcomers
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<thevaliantx>
jhass i have no idea. the tutorial i was using said nothing about switching out of root after running the sudo apt-get install commands.
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<jhass>
weird tutorial to make you run any at all, RVM does that for you
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<jhass>
but just check whether that directory exists please?
<apeiros>
that tutorial doesn't seem to tell you to install rvm as root.
<thevaliantx>
apeiros: correct, but it never told me to switch out of root after running the apt-get commands, either. that's where the confusion was.
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<apeiros>
thevaliantx: it never told you to use root to do apt-get either
<apeiros>
it told you to use sudo
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<thevaliantx>
apeiros: i typed "sudo apt-get install..."
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<mikhael_k33hl>
WHen using the attr_accessor, attr_reader, and attr_writer, how do I determine what kind of variables are set for it or is it automatically considered an instance variable?
<apeiros>
yes, that's a) not the same as being root and b) drops the elevated privileges right after that call
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<thevaliantx>
apeiros: okay. getting off track here.
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<jhass>
mikhael_k33hl: always instance variables
<mikhael_k33hl>
jhass, oh okay thanks
<jhass>
thevaliantx: ping back when you purged RVM using above guide
<thevaliantx>
jhass i'm not sure which command i should start with. "rvm get head"?
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<apeiros>
thevaliantx: it's difficult to help you if what you say you did is not what you actually did.
<jhass>
thevaliantx: the second to last entry on the page I linked you
* apeiros
afk, jhass got you covered
<jhass>
all the commands there
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<thevaliantx>
jhass okay. ran the commands and then ran rvm ... no rvm found
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<jhass>
we just purged all traces of it, quite expected, don't you think?
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<thevaliantx>
yes :D
<jhass>
close your terminal emulator and get a new one please
<thevaliantx>
okay
<jhass>
as your normal working user, not as root, not prepending sudo, run gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
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<thevaliantx>
okay. complete
<jhass>
as your normal working user, not as root, not prepending sudo, run \curl -sSL https://get.rvm.io | bash -s latest
<flughafen>
hey shevy
<thevaliantx>
okay. completed.
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<jhass>
good, now go to your terminal emulators settings and there configure it use a login shell
<thevaliantx>
am i the only in here up at 4am?
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<thevaliantx>
i don't see an option in LXTerminal to configure that. xterm doesn't have any options
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<thevaliantx>
jhass thanks. i ran the first step on that page for configuring lxterminal. it suggested i might have to log out of the session and back in.
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<jhass>
silly system, but okay
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<adaedra>
Greetings.
<apeiros>
bonjour adaedra
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<thevaliantx>
hi adaedra
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<jhass>
thevaliantx: so after having done that, check what rvm current reports, if it says system run rvm install 2.3.0 (still not as root or using sudo, but if that asks you for your sudo password, give it)
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<thevaliantx>
jhass ... said system ... no password required.
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<jhass>
once that's through run rvm use --default 2.3.0 and check rvm current again
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<idletask>
Yay, I can actually parse pretty complex expressions now
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<thevaliantx>
no woman can conquer you now :)
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<thevaliantx>
idletask: feel free to throw tomatoes, but that was intended for you :)
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<thevaliantx>
jhass: rvm current shows it running ruby-2.3.0
<jhass>
congratulations, that's all
<thevaliantx>
wow. thank you very much :) is it gems that i need to install for modules? i read about something called "shoes" today.
<jhass>
yes
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<jhass>
simply run gem install shoes4 (I think that was the last active one)
<jhass>
again, no sudo, no root
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<thevaliantx>
says shoes4 not found in repository
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<nocontrol>
I am receiving a string by an http request which is in this form https://gist.github.com/anonymous/4e67261b71df6aa7e554. When I am try to parse it, ruby sees it as a String and not a Hash. Is there any way I could parse it or am I thinking completely wrong ?
<gregf_>
^^ nocontrol # you need to have more control :|
<nocontrol>
gregf_: I believe I got something
<nocontrol>
gregf_: thank you
<gregf_>
dont wish *begs*
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<StyXman>
I'm trying to install a gem for which I already have most of the deps installed in the system (via my distro's packages), but even with --minimal-deps, it tries to install ffi-yajl-2.2.3 (which it is on the versoin 2.2.0-1+b3 on the system). my question is how can I figure out if the gem I'm trying to install is asking for 2.2.3 specifically or is it ignoring/not finding the one in the system. this is the wh
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<Takumo>
I've been using RVM for so long I don't know if something's superceeded it
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<jhass>
Takumo: I prefer rbenv the least. a small and often recommended setup these days is chruby & ruby-install
<havenwood>
Takumo: I think most folk around here will point you to chruby/ruby-install but they're all in wide use.
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<papachan>
havenwood: so we hace to use openssl-1.0.2g in that case?
<tuelz>
I would point you to getting a home server and having a VM for each version of ruby, but I'm a terrible person
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<Takumo>
tuelz: nah, custom chruby thing which spins up ec2 instances and runs there
<havenwood>
papachan: The ruby-build tool hardcodes openssl and relies on you to install other deps. You could try using ruby-install to install for rbenv (it will build against your package manager openssl): https://github.com/postmodern/ruby-install#integration
<Takumo>
or docker...
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<tuelz>
Takumo: but but they might have a free tier and I want them to waste money...
<havenwood>
papachan: Or there may be a ruby-build flag to specify openssl, I dunno. AFAIK they always hardcode.
<papachan>
havenwood: is there already a github issue to see how people resolve it?
<havenwood>
papachan: Ah, 2.2.3, OSSL_SSL_METHOD_ENTRY(SSLv3). Try with Ruby 2.2.4.
<papachan>
ok
<jhass>
or just upgrade to 2.2.4, yeah
<havenwood>
papachan: Or ^
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<papachan>
it work with 2.2.4
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<havenwood>
papachan: nice
<LastWhisper____>
hey guys, i wrote a script that compares some computed values to an array of values... but since my list of values I'm iterating over is near ~6 million, I was wondering if I can do anything different that speed up the process?
<LastWhisper____>
I'm comparing it this way: elsif !(KNOWN_HASHES.include? digested) && counter <= NUM_OF_TRIES
<LastWhisper____>
so I would declare KNOWN_HASHES as a set, and then to compare just do KNOWN_HASHES.subset? digested
<LastWhisper____>
?
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<jhass>
still include?, but using a set makes include? O(1) instead of O(n)
<LastWhisper____>
excellent
<LastWhisper____>
thank you jhass
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<LastWhisper____>
I'll report back with the speed difference :D
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<jhass>
if that's still too slow port it to Crystal :P
<Takumo>
Well I upgrade to 2.2.4 but I'm getting the following error: ruby: symbol lookup error: /home/leo/development/projects/ke-api/vendor/ruby/2.2.0/gems/tiny_tds-0.6.2/lib/tiny_tds/tiny_tds.so: undefined symbol: rb_thread_blocking_region
<Takumo>
is this something which is known to have changed in ruby? (rb_thread_blocking_region)
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<LastWhisper____>
jhass you're blowing my mind. I had no idea about Crystal
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<LastWhisper____>
-_- that's how easy it is lol
<jhass>
well, basic OpenSSL binding is in stdlib ;)
<LastWhisper____>
Maybe I'll bump up my "tonight" plan to lunch today to get this ported over to Crystal
<LastWhisper____>
to see the time difference
<jhass>
<3
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<Takumo>
so Crystal is a fully compiled language with a ruby-like syntax?
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<jhass>
yes
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<adaedra>
I think they even have their own channel.
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<Takumo>
I imagine they do... im sorta niterested but also there's too many other languages I'm trying to do projects in like Golang and Clojure
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<x77686d>
With Ruby 2.2.4 I seem to be seeing exponential slowdown with string[n] = "x", as n grows. Is this a known problem?
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<x77686d>
I don't see it with 1.9.3
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<shevy>
come to 2.3.0 and be a happier person
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<Mon_Ouie>
Exponential? Not linear in n? (since the whole string needs to be iterated over if the encoding is something like UTF-8)
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<hxegon>
how do I split a hash into an array of hashes? google/docs aren't cooperating today :\
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<hxegon>
nvm, just remembered hash includes Enumerable, so has #group_by
<jhass>
.group_by ? the question is kind of vague
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<hxegon>
I got it, thanks jhass
<x77686d>
Mon_Ouie: Ah, probably an encoding issue!
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<LastWhisper____>
jhass random question: I currently have a loop that runs 100k times, where i sha256 the keyword, and then after it's digested, I check the array (now a set), to see if it matches. Would it be more efficient to create a set of the 100k digested ones, and then verify after the keyword has been looped 100k times?
<jhass>
no
<jhass>
I'd expect that to be slower since you need to allocate the array/set for the 100k
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<x77686d>
Mon_Ouie: I see the same slowdown with 'ruby -E US-ASCII:US-ASCII ...'
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<idletask>
Ox0dea: I've made quite some strides in the parsing; after all, it's not that hard
<idletask>
It's just a matter of decluttering the language grammars
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<workmad3>
x77686d: looking at it, I'm pretty sure you accidentally introduced an O(n^2) aspect into your test... `string[n]` is O(n), and you're repeating that n times for your input, so your test for n is doing n lookups of O(n) for a total test run of O(n^2) time
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<apeiros>
workmad3: with 1byte=1char encodings like us-ascii string[n] should be O(1)
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<apeiros>
weird code style to put |i| on the next line
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<workmad3>
apeiros: ah, true...
<apeiros>
and I was actually pretty sure they optimized for that. might be that they only do for binary, though.
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<apeiros>
would be bad, though
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<apeiros>
but reading that gist I'm not quite sure why x77686d thinks it was exponential
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<apeiros>
linear from 1000=0.6s would be 10_000=6s, 100_000=60s
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<jhass>
eh nvm, eql? did work
<jhass>
kinda dizzy here
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<cwarner>
I'm trying to understand how recursive functions in ruby work with varirables and the stack.. if you call a recursive function how does ruby handle external vars from that function.. I'm looking at an example where it keeps the scope of that var on the stack
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<ravster>
hello all
<ravster>
I would like my binstubs to not specify the ruby version (2.3 in my case). I can't find a flag on the binstubs command to do something like this. Right now the binstubs start with the magic comment '#!/usr/bin/env ruby2.3'. I would like it to be just 'ruby'. Is there a way to do this without manually changing the binstubs?
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<cwarner>
ehhh let me just look
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<jhass>
"the binstub command"?
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<Sigma00>
rbenv
<jhass>
cwarner: I don't quite follow, it probably doesn't do anything like that
<x77686d>
apeiros: I was away for a bit. Thanks for those thoughts.
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<gregf_>
s/alond/along/
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<jhass>
dkk: it returns an array
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<cwarner>
gregf_: hrmm yes
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<gregf_>
cwarner: well, i managed to trick you :).. the function gets called once i guess :|
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<cwarner>
so basically I have to explicitly terminate
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<dkk>
jhass: will this also return an array? a.index{|x| x.equal? 2}
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<chevdor>
hello, I dont have much experience with ruby. I am trying to run a ‘bundle install’ which fails telling me that recog needs ruby 2.1. I have ruby 2.3… gem install recog works all fine. I found an older ruby 2.0.x on my system in /usr/bin. I removed it and symlinked to ruby 2.3. What can I check to move on ?
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<cwarner>
ok so make static, explicitly terminate
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<cwarner>
ughh
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<shevy>
chevdor that's quite annoying if bundler tells you that you must use an older ruby version
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<chevdor>
shevy: what I confusing is that it tells me that I need 2.1 or above and I have 2.3 which, if my math is correct, should be ok :)
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<shevy>
well, it's bundler
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<shevy>
2 + 2 is sometimes 5
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<chevdor>
shevy: any idea how I can fix that? Is there a cache to cleanup ? I did run a gem cleanup already
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<jhass>
dkk: no?
<shevy>
chevdor no idea sorry
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<jhass>
?pry dkk
<ruby[bot]>
dkk: Pry, the better IRB, provides easy object inspection `ls`, `history`, viewing docs `?`, viewing source `$`, syntax highlighting and other features (see `help` for more). Put `binding.pry` in your source code for easy debugging. Install Pry (https://pryrepl.org/): gem install pry pry-doc
<chevdor>
shevy: ok, no problem. Thanks for your input.
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<idletask>
Ox0dea: ping
<cwarner>
gregf_: mmmmmm I guess my use case is more simple but I get it..
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<gregf_>
cwarner: if i may ask, what is your usecase like?
<jhass>
so bundle config shebang should you allow to override it
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<apeiros>
workmad3: I <3 .b
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<apeiros>
easy and quick
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<apeiros>
f.ex. " ".b * 100
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<cwarner>
gregf_: in the specific case it's a simple recursive function that checks a the type of param passed and does some work.. but as a call it back it keeps the value types from the previous scope so even though we check type it doesn't stop.. pretty simple stuff I don't have to really care about pushing on the stack really
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<x77686d>
Re string encodings, is there a simple way to say "I want all strings to be US-ASCII?"
<gregf_>
hrm.. looks slightly complicated :|...but possible ;)... not sure about recursion tho.. could be solved without it... possibly
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<cwarner>
gregf_: naaa shouldn't be what i will do is just make the pass param static and try that.. infact let me see here
<workmad3>
apeiros: nice :) still seeing some linear increases though
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<workmad3>
x77686d: if you want string literals to be ascii, you can add `# encoding: US-ASCII` at the top of your source file(s)
<apeiros>
workmad3: hm. hmmm. that's bad.
<apeiros>
I haven't actually read your gist until yet.
<apeiros>
you always do 1000 lookups and only the stringsize varies, right? so the expected time should be always the same?
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<apeiros>
I meant 10_000 lookups
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<idletask>
x77686d: do you realize that there is no such thing as "ASCII strings" to begin with?
<workmad3>
apeiros: yeah
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<workmad3>
apeiros: oh wow... adding an encoding comment suddenly drops the time :/
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<x77686d>
tell me more re "no such thing as 'ASCII strings'" :)
<idletask>
apeiros: by the way, any comments on my post you read?
<cwarner>
yeah a static var and a return.. straight
<apeiros>
idletask: nothing beyond what I already said
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<apeiros>
idletask: us-ascii encoded strings in ruby are binary
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<idletask>
x77686d: text, and their byte representation, are two separate things
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<apeiros>
and while I'm not fond of the name it's somewhat instructive in that the lower 7 bits are to be interpreted/presented as ascii
<idletask>
apeiros: it depends on the encoding of your _source file_ to begin with, in most languages; and, if I'm not mistaken, including Ruby
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<apeiros>
idletask: ruby assumes a source file to be utf-8 unless you tell it otherwise. and it will accordingly set the encoding attribute.
<apeiros>
but of course you can mislabel the encoding just like from any other source
<idletask>
OK, I haven't tested, but what happens if you _do_ declare at the beginning of your .rb file, that "# encoding: US-ASCII", that your editor saves in UTF-8 and that your string literal is "Mémé dans les orties" (note the 'é')?
<apeiros>
and using escapes, you can write strings in other encodings
<idletask>
'é' is not even _representable_ in ASCII
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<apeiros>
idletask: oh wait, I confused us-ascii and ascii-8bit
<apeiros>
with us-ascii you probably get a conversion error
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<apeiros>
you can try, though :)
<idletask>
Even though this is a Ruby room, I can tell what happens in Java... And what happens is that in Java, strings are stored in class files independently of the encoding of your source files
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<apeiros>
in ruby, strings are always stored as a bytearray
<idletask>
It is therefore the role of the compiler to figure out all this, and this is the file.encoding property
<idletask>
apeiros: in Java, ultimately, this is also the case
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<idletask>
In fact, in class files, string constants are stored in what is called "modified UTF"
<idletask>
(rather ugly; it happens that it works)
<apeiros>
idletask: actually, I revert my previous statement
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<apeiros>
you won't get an encoding error
<apeiros>
ruby doesn't care whether the byte array is valid with regards to the encoding
<idletask>
Erm
<apeiros>
you'll only get an error once you try to perform anything on it which requires character representation of the data
<idletask>
Ah
<apeiros>
>> "\xff".b.force_encoding('us-ascii') # works just fine
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<apeiros>
>> 127881.chr('utf-8')
<ruby[bot]>
apeiros: # => "
<idletask>
>>0x1f4a9.chr("us-ascii")
<ruby[bot]>
idletask: # => 128169 out of char range (RangeError) ...check link for more (https://eval.in/532180)
<idletask>
OK
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<idletask>
>>0x1f4a9.chr("utf8")
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<ruby[bot]>
idletask: # => unknown encoding name - utf8 (ArgumentError) ...check link for more (https://eval.in/532181)
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<idletask>
>>0x1f4a9.chr("utf-8")
<ruby[bot]>
idletask: # => "
<idletask>
damn you
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<idletask>
My favorite code point
<idletask>
OK, so .chr does mean in fact any Unicode glyph
<apeiros>
it means codepoint
<idletask>
Strange name though
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<apeiros>
for most encodings thats 1:1 the binary value
<idletask>
I'd have called it, I don't know, as_codepoint?
<apeiros>
well, I think the method is older than unicode :)
<idletask>
Yes, but not all
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<idletask>
Older than _Unicode_?
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<apeiros>
it is definitively older than encodings in ruby
<idletask>
When was Ruby born?
<idletask>
Waaay after Java, right?
<apeiros>
no
<apeiros>
about a year or two after java
<apeiros>
somewhen between 1993 and 1995 iirc
<idletask>
Well, by the time Java was born, Unicode was already born
<apeiros>
ok, unicode is older
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<apeiros>
but it's older than utf-8 :)
<idletask>
OK, a little history lesson here, maybe that explains things for ruby as well :)
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<ravster>
jhass: thanks, that link helps.
<apeiros>
re history lessen: up until ruby 1.9, ruby didn't know about encodings
<apeiros>
*lesson even
<idletask>
Java was born when Unicode already existed (and UTF-8 too, by the way); and at this time, Unicode only defined code points below what is now known as the BMP, ie code points less than, or equal to, U+FFFF
<idletask>
As a result, Java's char is an unsigned, 16bit integer (and the only unsigned primitive in Java)
<apeiros>
idletask: um, wikipedia shows rfc2044 as oldest rfc and that's from 1996
<idletask>
But since then Unicode has defined code points outside U+FFFF
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<idletask>
apeiros: that is about the time when Java was born
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<idletask>
In fact it was born a litte earlier than that
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<apeiros>
WP says 1995
<apeiros>
ruby is 1995 too btw.
<idletask>
But anyway, as time went, Unicode defined code points greater than U+FFFF
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<idletask>
As a result, char couldn't fit anymore; the result? Code points outside the BMP take two chars
<idletask>
And a char is now a UTF-16 code unit
<idletask>
I guess that Ruby's chr name bears a somewhat resemblant history
<apeiros>
well, I guess .chr is simply a bad abbreviation for char
<apeiros>
(which in turn is of course an abbreviation of character)
<idletask>
Yep... Just as char in Java is now misnamed
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<apeiros>
o0
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<idletask>
Well it is
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<apeiros>
how'd it be misnamed? just because java needs 2 chars for a single codepoint?
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<idletask>
At first it was supposed to be a primitive to hold a code point
<idletask>
Now it cannot do so anymore
<apeiros>
so?
<apeiros>
that single codepoint is still a single character
<idletask>
No
<apeiros>
java's capabilities are irrelevant to that
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<idletask>
Not for code points outside the BMP
<apeiros>
um
<apeiros>
you're arguing that
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<idletask>
I am arguing that while it is a single Unicode code point, it is not an atomic entity with regards to Java
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<apeiros>
as said, java's capabilities are irrelevant outside of java
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<apeiros>
and for a method called "character", what matters is whether its result is a character.
<apeiros>
the better venue to call it a misnomer would IMO be - what was their name again - surrogates, I think?
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<apeiros>
where you use multiple codepoints to form a single character, iirc only in D normalization
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<idletask>
Erm, no, for a single glyph there is only ever a single code point :p
<xpt>
I have Rakefile that is spawning test cases for me. I have this Rakefile http://sprunge.us/RbGj, when i run rake test sometimes I get this output: http://sprunge.us/KFaJ (very same output as running rake test with tests directory empty). How can I debug what is the problem?
<xpt>
When i run `rake test` again it's back to normal
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<Somelauw>
I have a script that does require 'optionparser', doing em search optionparser says OptionParser (0.5.1), running gem install --local OptionParser says ERROR: Could not find a valid gem 'OptionParser' (>= 0) in any repository
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<xpt>
Somelauw: You want to use '-i' parameter
<xpt>
Somelauw: try reading output of 'gem help install'
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<Somelauw>
xpt: the correct one is --user-install
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<Somelauw>
I was confused with --local
<Somelauw>
because .local is a sane location for such sort of thing
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<Somelauw>
still I'm getting the following error: /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -
<Somelauw>
- optionparser (LoadError)
<Somelauw>
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
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<Sammitch>
so when using the Mysql2 gem, prepared statements, and passing a string containing hex-encoded binary data destined for a VARCHAR column it appears that somewhere between the `execute()` and the actual query the data is being converted from a hex string to an integer.
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<Sammitch>
cool beans. I used the wrong variable name in my execute statment so instead of doing literally *anything* sane relating to an undefined or nil variable it appears to have used god-knows-what from god-knows-where
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<ahammond>
In python, I can say foo.get(key, default). What is the ruby equivilant?
<Radar>
proof plz
<Radar>
ahammond: foo.fetch(key, default)
<ahammond>
Thanks @Radar
<adaedra>
ahammond: better explain what it does, not everyone here knows python.
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<Radar>
adaedra: I think I have a pretty good idea. ahammond: it gets the key if it exists, otherwise returns a default value?
<ahammond>
yup, exactly that.
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<adaedra>
Radar: I suspected it too, but it's better with a full explanation.
<Radar>
adaedra: agree
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<xpt>
so it's like ${foo:=default} in shell?
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<Somelauw>
Is there anyone here why does understand how gems work?
<adaedra>
?anyone
<ruby[bot]>
Just ask your question, if anyone has or can, they will respond.
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<Sammitch>
Radar: I'll see if I can whip up a self-contained example.
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<cippaciong>
Hello, I'm fiddling a bit the bson gem and I started creating a simple, one line, document. When I try to "puts" the document though, which should be in hex format, some of its hex codes are replaced by the corresponding ascii chars
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<cippaciong>
Is there a way to prevent this?
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<adaedra>
why is what even a thing
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<weaksauce>
it's just a method on Object instances
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<weaksauce>
Sammitch you just got unlucky and passed in a misspelled function name
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<weaksauce>
not sure there is a way to prevent that other than automated testing
<adaedra>
Sammitch: you have to remember that you are ALWAYS in the context of some object.
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<Sammitch>
I am trying to contain my disdain for this language's syntax, and it is currently causing me actual PHYSICAL DISTRESS
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<adaedra>
meh.
<tubbo>
Sammitch: grow up
<weaksauce>
Sammitch it's pretty elegant once you get past the learning curve
<tubbo>
j/k
<tubbo>
i get physically distressed at all programming so i have no room to talk
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<Sammitch>
the fact that you can call methods without braces and the scopes have virtually no distinction
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<weaksauce>
> the scopes have virtually no distinction?
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<Sammitch>
how is someone supposed to distinguish betwee local and object scope, say when calling a particularly-named variable like 'hash'
<tubbo>
Sammitch: you actually called a particuarly-named method called `hash`. not a variable.
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<Sammitch>
tubbo: and how am I supposed to know that I called a method rather than a variable?
<tubbo>
in ruby it's harder to make that distinction, but in general it's encouraged to make use of method calls that return values rather than saving values off into local variables.
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<apeiros>
Sammitch: did you assign to a local variable named hash? no? ok, not an lvar.
* baweaver
scratches head
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<apeiros>
and knowing your current local scope should be trivial. if not, your local lexical scope is too long.
<adaedra>
You usually have scopes small enough to be able to see what are your variables, yeah.
<tubbo>
Sammitch: from syntax alone? you can't always make that distinction. but in the way that ruby is canonically written, you don't have to know that information all the time.
<tubbo>
Sammitch: just like when you're in any dynamic language, you don't need to know where exactly in RAM each object is being stored.
<tubbo>
or in most dynamic languages, what type the object is
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<_dev>
hey all, is there a way that I can force gem to only install from one source via command line?
<apeiros>
Sammitch: and while you've been bitten by this now, from experience it is *exceedingly rare* that you get bitten by lvars & methods looking the same.
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<_dev>
im trying with gem install --source http://x.y.z.a/rubygems $gem_name, but it still tries to query rubygems
<weaksauce>
Sammitch eloquent ruby is a great book if you are interested in learning the idioms
<_dev>
behind a firewall that blocks rubygems.org, so it just hangs until it times out.
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<adaedra>
_dev: if you're never going to use rubygems, you can remove the source, I guess.
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<_dev>
Unfortunately, removing the source for some reason still tries to reach to rubygems
<_dev>
I'm not really sure why.
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<tubbo>
_dev: because rubygems installs default gem source configuration to https://rubygems.org and it is A BITCH to get it out :D
<tubbo>
_dev: unfortunately rubygems assumes you have a public internet connection :(
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<Sammitch>
apeiros: IMHO it should not simply be "rare" it should be *impossible*. I know that complaining about language syntax is more or less pissing in the wind, but... [incoherent rant comprised of mostly expletives]
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<adaedra>
I hope you're just angry because of a stupid error (we all do those, they're all maddening) and not just come here to rant endlessly about Ruby.
<tubbo>
just python things :D
<apeiros>
Sammitch: yeah, no. writing bugs is always possible in all languages in all possible and impossible ways.
<apeiros>
so no, you won't get that wish granted.
<cippaciong>
_dev I don't know if it would work and it's kind of hacky, but what about trying to resolve rubygems.org as x.y.z.a through the hosts file?
<apeiros>
and it's just a matter of where you're coming from which decides what venues to introduce bugs one considers acceptable
<tubbo>
python is way better for that kind of thing but the language itself isn't as expressive. it just looks ugly comparatively, but in many cases python can be easier to grok immediately.
<tubbo>
like i'm not even a python dev and i've contributed to Sick-Beard as well as written ableton live remote scripts. it can't be THAT hard ;)
<adaedra>
tssk tssk tssk, we're not going into language wars.
<weaksauce>
python is nice. ruby is nice. end.
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<adaedra>
Thank you.
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<machty_>
what comparison operator does Ruby use for group_by?
<apeiros>
machty_: it's based on Hash, so .hash and .eql?
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<apeiros>
and I suspect that's in the documentation ;-)
<machty_>
wow really, ok i'll try that
<machty_>
i looked!
<machty_>
i assumed <=> or ==
<apeiros>
that'd be quite slow
<apeiros>
as it'd have to compare with all groups
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<apeiros>
machty_: well, it returns a Hash with the group_by result as keys. and Hash says "Two objects refer to the same hash key when their hash value is identical and the two objects are eql? to each other."
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<machty_>
apeiros: wahoo i got it!
<machty_>
thank you
<apeiros>
yw
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<floatingpoint>
does LoadError output any information about the error in question, and if so, how can I access said information?
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<jhass>
>> require "foo"
<ruby[bot]>
jhass: # => cannot load such file -- foo (LoadError) ...check link for more (https://eval.in/532217)
<apeiros>
floatingpoint: like all exceptions it has .message and .backtrace
<jhass>
normally it's right in the message
<apeiros>
what else are you looking for?
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<Radar>
?popcorn
<ruby[bot]>
It's popcorn time!
<Radar>
oh I was scrolled up :(
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<Radar>
siaw: If you want the emails and the first names well I'm sure you can figure out how to do that with the gist I just made for you.
<Radar>
ps my paypal is radarlistener@gmail.com
<siaw>
yeap
<siaw>
easy now
<siaw>
paypal email
<siaw>
hahahahaaaaa
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<Radar>
Consider it a "laziness tax"
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<siaw>
if it only it worked :p
<siaw>
it’s not
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<Radar>
?didntwork
<ruby[bot]>
What "didn't work"? Did your server not start? Did your computer explode? Did your webpage turn bright pink? Did your client not pay your bill on time? You may have to be more specific. A Gist (http://gist.github.com) of the code that doesn't work (and the error you are getting) will be helpful.
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<Ox0dea>
The second one. I ran `rvm implode` and it must've been in one of its literal moods.
<Ox0dea>
Is there some sort of rollback mechanism for un-exploding my computer?
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<siaw>
Radar: i’m trying to get the email and first name of each line, is this wrong?
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<Radar>
siaw: Is what wrong?
<Radar>
That you are trying to do that?
<idletask>
Ox0dea: fwiw, I am 40% done in parsing full Ruby expressions; tokenization still bears wrong names, however (that is my belief)
<idletask>
SonarQube's API requires that ungodly syntax
<idletask>
Well, anyway, the "state of the art" plugin at the moment is at https://github.com/litesolutions/sonar-ruby; by the end of the week there will be a basic plugin running
<idletask>
But the advantage is that the desing is fully extensible
<idletask>
So, as I go, I'll find more stuff that I don't parse, add tokens, grammar rules, and parser rules
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<Ox0dea>
Sounds good. Kudos for not reaching for XML in the interests of extensibility. :P
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<idletask>
XML is like violence; it doesn't work? Just use more
<idletask>
No thanks
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<idletask>
After all, I _am_ the author of the current JSON Schema IETF drafts, so I stay away from XML as far as I can :p
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<Wicaeed>
In a case statement, if a value is matched more than once, which value is returned by the statement, the first instance of the match, or the last?
<idletask>
Wicaeed: the first -- that would be logical
<Ox0dea>
Wicaeed: Aye, first match wins.
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<idletask>
(wait, can you have boolean expressions with "case" in ruby?)
<Ox0dea>
I could conceive of an argument for matching the most specific rather than the first, but that's hard to pin down.
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<Ox0dea>
idletask: `case` tries each clause's #=== method against the "subject" and evaluates the body of the first one for which that evaluation returns truthy.
<Ox0dea>
#=== has a useful custom definition on several classes, to include Class, Regexp, and Proc.
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<idletask>
Ox0dea: I was misled; in fact, ruby's case/when is what I thought was switch/case in other languages
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<idletask>
It appears not
<Ox0dea>
It is, it's just much better. :)
<idletask>
Meh, I still have a s*load to learn
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<siaw>
if i have an array how to i print each pair on a line?
<Ox0dea>
Ruby is a massive language.
<idletask>
Yup, and much older than I thought at first
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<idletask>
In fact, it's nearly as old as Java
<idletask>
And that is saying something in 2016
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<Ox0dea>
Is it?
<idletask>
I'm going to enjoy learning it, I think!
<idletask>
Yup
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<idletask>
Java and Ruby were both born in 1995
<Ox0dea>
Well, if it's "saying something", I'm not sure what.
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<idletask>
It means that it has a history behind it, and that history has influenced the language
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<Ox0dea>
That sounds like a tautology, frankly.
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<idletask>
Take chr
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<Ox0dea>
Loads of languages use "chr" and "ord" as and where appropriate, irrespective of their age.
<idletask>
Ruby, like Java, was born at a time where Unicode didn't define code points outside the BMP
<idletask>
Had it been born after this period, would that function be named chr?
<Ox0dea>
Er, why not?
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<Ox0dea>
It's short for "character", and Ruby has long been okay with the fact that "characters" can be constructed from more than one byte.
<idletask>
It would have been named glyph -- and org, codepoint
<idletask>
You seem to be mixing code points with byte representation
<idletask>
ord, sorry
<Ox0dea>
Yes, I guess I see how you mean now, but #glyph would still be kinda surprising.
<Ox0dea>
Every codepoint maps to an individual character, no?
<idletask>
Yes
<Ox0dea>
So why would Fixnum#glyph be the more appropriate name?
<idletask>
In fact, Unicode goes even further than that and calls glyphs "graphemes"
<idletask>
Because glyphs are visual representations
<idletask>
What you see in your editor, in fac
<idletask>
s,$,t,
<idletask>
Anyway, enough with that
<idletask>
All I know is that I'm going to enjoy that
<Canar>
Technically correct.
<Canar>
The best kind of correct! <3
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<idletask>
I love learning new languages
<idletask>
And parsing them to boot, it's heaven :p
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<idletask>
But I want to get that language plugin to a useful state
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