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<Mattx>
Hi
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<Mattx>
I'm using nokogiri to parse some pages that I downloaded using curb
<Mattx>
is there a way to run the js code before that?
<Mattx>
there are some tags that are created by js when the page loads, I'm missing all those tags
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<pontiki>
use something like phantomjs
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<frem_>
I want to use a single method in a module. Right now I'm adding that method to my class using `include ActionView::Helpers::TextHelper` and calling it via `truncate("some text")`. I don't like how it's not immediately obvious that the method isn't coming from TextHelper. Is there some way to call it like `TextHelper.truncate` without including a bunch of
<frem_>
other helpers?
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<mbff>
How do I install a gem so I can modify the source
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<mbff>
I want to download a gem to a directory and modify it.
<eam>
mbff: gem contents will show you the actual file locations
<eam>
but you probably want to find where its source control is hosted and work from that
<waxjar>
frem_: include ActionView::Helpers
<eam>
have you looked at the metadata to see?
<mbff>
hmmm? Sorry I am new to ruby
<frem_>
waxjar: doesn't that also load every other helper in ActionView?
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<banisterfiend>
waxjar no..
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<waxjar>
the constants are accessible, yes
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<banisterfiend>
waxjar but the method is not accessible :)
<banisterfiend>
so it's uselss to do that afaict
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<eam>
mbff: gem specification, does it have a homepage? is it on github?
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<waxjar>
he wants to access it like Module.method, no?
<banisterfiend>
waxjar yeah, but ti's not a class method, it's an instance method
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<Scriptonaut>
anyone know why "require 'taglib'" won't work? it says: cannot load such file -- taglib (LoadError). I did gem install taglib-ruby (successfully), and I include rubygems before it
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<jhass>
the later is done automatically since ruby 1.9
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<jhass>
your ruby most likely runs in a different environment than your gem command
<jhass>
check gem env
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<jhass>
and compare for example to ruby --version
<jhass>
also a good check is head -1 $(which gem)
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<Radar>
Scriptonaut: Where are you doing the require?
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<jhass>
also check what path gem which taglib reports, compared to your ruby version
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<Scriptonaut>
oh, I iddn't se eyou guys replied, let me gist it
<helpa>
Rails 4 in Action - http://manning.com/bigg2 - An excellent book combining Rails and TDD/BDD development. Written by Steve Klabnik, Ryan Bigg, Yehuda Katz
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<mices>
ty
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<mbff>
I installed rencode and got this
<mbff>
main.rb:9:in `require': cannot load such file -- deluge (LoadError)
<mbff>
from main.rb:9:in `<main>'
<mbff>
so less errors this time.
<shevy>
lol
<eam>
b3itz: sure, share your code?
<shevy>
so wat mbff
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<shevy>
rencode wants deluge
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<shevy>
and deluge wants rencode
<shevy>
mbff do you see that your errors can not make much sense? this is a circular dependency you are describing
<shevy>
mbff ah
<shevy>
mbff well try to install deluge again
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<mbff>
bundle or gem install?
<shevy>
now you should have fulfilled rencode dependency
<shevy>
no idea about bundler, I never use it
<sevenseacat>
lol at never using bundler
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<sevenseacat>
you poor thing
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<shevy>
what for
<b3itz>
eam: ummm... not that far yet lol
<mbff>
same error after "gem install deluge"
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<b3itz>
eam: do i create a new empty hash, then add each string with a value of 1?
<shevy>
mbff yeah I think that gem is broken; gems normally have specified their dependencies properly where you can see them online at rubygems.org too, that gem however does not list a dependency on rencode at all so the guy who wrote it possibly did not know what he was doing
<b3itz>
a key of 1
<eam>
b3itz: that should be fine, sure
<mbff>
alright anyway I can fix it, I really need deluge for my project
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<eam>
b3itz: or rather, you want to increment by one. right?
<eam>
b3itz: consider how you might write it without special casing the first time through
<eam>
but if you really want to: if not hash.include?(thing)
<b3itz>
ip_hash.has_key?(ip_string)
<b3itz>
?
<eam>
yes
<b3itz>
boom
<b3itz>
thank you stackoverflow
<eam>
b3itz: same as include?
<eam>
include? and has_key? are aliases to the same method
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<b3itz>
why am i getting an undefined method? if ip_hash.has_key?('ip_string') == false
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<eam>
b3itz: what is the full error?
<eam>
don't read selectively, read the entire line (or paste the entire line)
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<b3itz>
syntax error, unexpected '=', expecting keyword_then or ';' or '\n' if ip_hash.has_key?('ip_string') = false
<b3itz>
eam:
<eam>
= vs ==
<b3itz>
ok fixed that and got?
<b3itz>
:
<b3itz>
`block in <main>': undefined method `has_key?' for 0:Fixnum (NoMethodError) from Assignment5.rb:24:in `each_line' from Assignment5.rb:24:in `<main>'
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<eam>
b3itz: reading the whole line, what do you think it means?
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<b3itz>
oh
<b3itz>
that makes no sense
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<eam>
>> 0.has_key? "whatever"
<eval-in__>
eam => undefined method `has_key?' for 0:Fixnum (NoMethodError) ... (https://eval.in/230168)
<b3itz>
if false == false lol
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<b3itz>
i dont get the logic for writing this line
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<eam>
>> def method_missing(*f) "I can't even"; end; %i{c a n u e v e n}.map(&:to_proc).map{|f| send f}
<eval-in__>
eam => ["I can't even", "I can't even", "I can't even", "I can't even", "I can't even", "I can't even", "I can't even", "I can't even"] (https://eval.in/230172)
<The_NetZ>
heyo o/ question; if I'm simply creating ruby on the mingw-w64 platform to link against it, one could simply use make lib and make ruby-2.2.pc to create the dlls and pkg-config file; my question is, is there some nifty way of installing just the headers?
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<certainty>
moin rubyists
<lbrf>
certainty: o/
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<The_NetZ>
certainly :)
<The_NetZ>
badpun is bad
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<certainty>
xD
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<The_NetZ>
so, any ruby devs know the magick command for installing just the headers? :)
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<sevenseacat>
cant believe how long its taken you just to install ruby
<epitron>
mbff: i'm not sure what you want to do. does httparty not save cookies for you? are you trying to manually save them?
<The_NetZ>
but, I'm compiling mingw-w64-ruby simply as dev libs and headers, so the failure of ruby(w).exe is of little import to me :)
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<The_NetZ>
make lib and make install-lib handles the dll's and such, and I can write a small install -Dm644 bit to place the pkg-config file, but the headers.... that's the real bitch, methinks.
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<The_NetZ>
hanmac1: nice cats
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<The_NetZ>
sevenseacat: also, my internet is quite shitty so researching takes far more time than someone on a good connection :)
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<work_op>
hanmacl, its been overtaken by spam. i used to lurk 4chan's /prog/ textboard and it was shut down due to spam of the same nature as whats on ruby forum
<work_op>
...russians...
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<hanmac1>
stupid spammers :(
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<The_NetZ>
... that moment when you try to use ctrl+c to stop loading of a firefox page XD
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<The_NetZ>
should have switched to eCigs long ago
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<mbff>
I am having troubles changing a hash to json, yes I have tried to_json
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<mbff>
puts delugeResponse.body.to_json['result']
<mbff>
this returns "result"
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<versatiletech>
mbff: could you create a pastie with output of puts for delugeResponse.body
<tobiasvl>
arup_r: I'm assuming the second file in that gist isn't really called error.rb, but product.rb?
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<arup_r>
Yes.. That I gave in gist arbitary
<arup_r>
It is a product.rb
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<tobiasvl>
ok, good. you shouldn't give files arbitrary names when they're mentioned in the exception you want help with
<arup_r>
Gave it proper name... Concern is Activemodel is not working
<arup_r>
My custom vaildation is not working...
<mozzarella>
what if you move the CategoryValidator class above the Product class?
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<arup_r>
Didn't try..
<arup_r>
But does it matter.. ?
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<hanmac1>
arup_r: hm why not asking AR questions in the #rubyonrails channel?
<arup_r>
error Product::CategoryValidator (NameError) is saying... Product looking for the class CategoryValidator inside it.. don't know why
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<arup_r>
hanmac1: It is Ruby project.. not Rails :-(
<arup_r>
So..
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<hanmac1>
arup_r: but AR is Rails fault, so they need to fix it
<sevenseacat>
yet activemodel is a rails gem
<mozzarella>
arup_r: try it
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<arup_r>
ok
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<linocisco>
hi all i m compeletely new bie on Ruby
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<linocisco>
But I am so confused that about the differenece between Ruby and Ruby on Rails
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<mozzarella>
ruby on rails is a web framework
<mozzarella>
ruby is the programming language
<mark06>
how can I get the site/vendor ruby dirs?
<linocisco>
mozzarella, any example of other web framework?
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<mark06>
e.g. /usr/lib/ruby/vendor_ruby
<arup_r>
mozzarella: worked..
<mozzarella>
linocisco: sinatra, padrino, django, etc.
<arup_r>
What is the reasoning ?
<linocisco>
Morrolan, nothing them are popular. I heard only django a little
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<mozzarella>
arup_r: well, it must be defined when evaluating the line
<sevenseacat>
just because you havent heard of them, doesnt mean theyre not popular
<arup_r>
mozzarella: Humm.. Rails probably handle them some other way
<arup_r>
They are Genious.
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<mozzarella>
linocisco: do you know the difference between python and django?
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<linocisco>
Morrolan, i just heard django. dont know even what that is
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<krazyj>
hi guys… i’m writing a cron script that i want to be super robust. i have it written, now i want to implement logging… any thoughts on how to write these methods in a clear, concise way for logging: https://gist.github.com/joshavant/68a33519ec39f081bf48
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<krazyj>
for example, on line 29, i have `if app_store_response.success?`
<krazyj>
how might i rewrite that so, if it fails, i can write to a logfile
<krazyj>
use a vanilla else-block?
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<shevy>
krazyj of course you must use the code that will actually log into a file
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<shevy>
ideally use a method that will log and call that
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<shortCircuit__>
I have to change the address and specification in :params => {:company => { :id => 1 :address=> { :id=> 2}, :specification => { :id => 3}} to address_attributes and specification_attributes
<shevy>
sinelaw what happened to my return 33 line :(
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<canton7>
tbh it doesn't matter whether you've got line 4 in there at all iirc
<Mattx>
do you know any way to evaluate <script> tags before parsing html code with nokogiri? I need to process all tags in that code, even the tags introduced by javascript
<shevy>
canton7 how can this be! ruby ignores my instructions!!!
<canton7>
it's stopping you from being silly ;)
<shevy>
right - I have PHP for this
<shevy>
sinelaw you could document common PHP pitfalls :)
<canton7>
>> class A: def foo=(f); 'hi'; end; end; p A.new.foo = 'test'
<eval-in__>
canton7 => /tmp/execpad-e0dffde26b71/source-e0dffde26b71:2: syntax error, unexpected ':', expecting '<' or ';' or '\n' ... (https://eval.in/230277)
<shevy>
"from the same author ... the comparison to PHP" ... all stare at a document 10x as long
<canton7>
>> class A; def foo=(f); 'hi'; end; end; p A.new.foo = 'test'
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<sinelaw>
shevy, thanks
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<sinelaw>
shevy, if you have more, let me know or send a pull request.
<shevy>
yeah can't think of any right now
<shevy>
next time some newcomer asks a question here on #ruby, I may file an issue request at your github link :D
<shortCircuit__>
shevy :P I have to change it to the output you showed, like params[:company][:address_attributes] = params[:company].delete :address . but that may not work
<sinelaw>
shevy cool, thanks
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<shevy>
shortCircuit__ oh yeah... delete the old key, add a new key
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<shevy>
the above should work or? you remove the element with .delete, it is returned, then you call the method with the = and set a new one
<nerium>
I'm having problem with invalid sha*.bundle files in my ruby 2.0 installation. I solved it last time by copying sha2.bundle and sha1.bundle from a previous installation, which I dont have anymore.
<nerium>
Anyone knows where I can download these files?
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<shortCircuit__>
ok
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<shortCircuit__>
ee that worked!!
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<maasha>
I wish there was a method to remove bottlenecks :o/ => bottleneck.remove!
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<maasha>
If I delete this line 180 everthing would be much much faster - but broken ...
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<shevy>
lol
<shevy>
if you know C you could inline-C there
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<maasha>
shevy: Well, it is a hash of hashes of sets. Such a structure is messy to work with in C and probably with little gain. I need to think harder to come up with a better structure.
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<maasha>
Set.add is the slow part.
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<workmad3>
maasha: is adding to the sets able to be done in batches separate from the reading the sets?
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<workmad3>
maasha: because if so, you may find it's more performant to add to arrays, and convert to a set at the end, rather than having each additional item causing a uniqueness check over the entire set (you'd want to benchmark that though to be sure)
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<maasha>
workmad3: Not at the moment - I am awere of Set.merge
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<maasha>
*aware
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<maasha>
I'd rather use NArray's than Sets, but it blows memory.
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<maasha>
So I have a hash[8] of hashes[2**16] of sets[200000]. Number in [] indicate the number of keys.
<maasha>
or values rather
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<maasha>
It is a shitload of Sets that have values added once at a time. I should really load the sets in a smarter way.
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<maasha>
maybe I should use Google Sparse Hash instead of Set ...
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<maasha>
Anyone happen to have a Google Sparse Hash vs Set benchmark laying around :oD ?
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<maasha>
keys and values are Fixnums
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<shevy>
Set is slow
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<shevy>
you poor thing
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<maasha>
Yeah, I see that.
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<certainty>
shevy: Set is slow?
<maasha>
Ruby hash is faster
<certainty>
which operations?
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<zenspider>
maasha: sets of _what_? that's the important part
<deleg>
There's a lot of bad information out there relating to all this, and conflicting, too
<zenspider>
super duper clear. glad to google for you. That'll be $5.
<maasha>
zenspider: btw, have you messed around with NArrays? I was looking for example on how to manipulate NArrays with inline C. I can do NArray.to_s and get a packed bytearray which I can manipulate using inline C, but the other way around I never tried ...
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<zenspider>
maasha: I've never done narray via inline'd c, no.
<deleg>
zenspider: already read it
<zenspider>
but I was gonna suggest a packed byte array if you're really just doing sets of ints
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<zenspider>
deleg: my reading services are much much more expensive than my googling services.
<maasha>
zenspider: OK - could be useful I think.
<deleg>
zenspider: no deal, there's been no value
<zenspider>
and you should see the bill for my teaching services. daaamn.
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<zenspider>
maasha: might want to experiment on bignums & bit manip methods first, just to see how they bench against sets.
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<zenspider>
maasha: hrm... except that there's no []= on bignums and you'll be creating bignums on a real add
<maasha>
zenspider: I dont follow?
<zenspider>
which means your benchmarks will be biased by GC
<maasha>
NArrays are great for bitwise manipulation
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<zenspider>
what're you actually working on anyhow?
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<maasha>
zenspider: bioinformatics. DNA and RNA sequences. which basically are strings with a 4 char alphabet. Such strings we routinely break into overlapping kmers which can be encoded as list of integers and manipulated.
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<siaw>
canton7: but why does irb behave that way?
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<canton7>
siaw, because it's useful for debugging
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<siaw>
canton7: so it means irb will print anything that a method returns?
<canton7>
sure
<canton7>
and if you just type 'variable', it will print the value of the variable
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<siaw>
i see
<siaw>
canton7: thanks
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<shevy>
arup_r_ but I don't wanna read more, I already have about 15 books on my left side, all about chemistry and biology! can't overcrowd my small brain with more programming-related books - plus I have said a while ago that I will finally learn C seriously :(
<shevy>
that C book is somewhere under a pile of papers though... hahaha
<arup_r_>
shevy: you just register using the link.. which will increase my wining probability.. :-)
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<shevy>
what is the correct answer to the question
<claf>
I have a slightly negative attitude towards spamming competitions, especially with referral, on this channel
<arup_r_>
shevy: peter
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<arup_r_>
Pete Keen
<shevy>
hehe I was just wondering
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<shevy>
you don't even know either! ;D
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<arup_r_>
didn't get you..
<shevy>
actually, I think in northern germany and the netherlands... Pete is a real name, or the variant Peter there... Pete Glocke... or perhaps it is actually written Piet or Pjet ... in poland it is pjotr
<shevy>
well you wrote "peter" so I selected it... oh wait, there was only "pete" ;-)
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<txdv>
peter pan und die sieben schwuchteln
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<arup_r_>
shevy: Got you... :-)
<hgl>
i'm trying to access a deeply nested attr like obj.a.b.c, is there a quick way to tell ruby that if any level returns a nil, return nil immediately?
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<shevy>
txdv haha... what about the hobbits in lord of the rings when they were jumping sexily in the bed?
<txdv>
em
txdv was kicked from #ruby by apeiros_ [language]
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<txdv>
is german not allowed?
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<apeiros_>
you know full well what was the trigger.
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<shevy>
hgl I think not an intrinsic idiom; a primitive way would be to put it inside begin/rescue and rescue only nil errors like
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<txdv>
its just one fun sentence because they were talking about peter ban all the time
<apeiros_>
txdv: it's not fun. it's not acceptable in here.
<txdv>
no acceptance of german homosexuality
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<hgl>
shevy, ok, will try that, thanks.
<apeiros_>
no. no acceptance of abusing it for laughs and giggles.
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<shortCircuit__>
I have Company has_many employees and Employee has_many EmployeLeave. I have to get the employeeleaves for a particular company, I was goin to try @company..employees.joins(:employee_leaves) but that would give me Employee array. Is there a way to get the employeeleaves without doing looping statements like @company.employees.collect{|c| e.employee_leaves}
<shortCircuit__>
*c.
<apeiros_>
shortCircuit__: #rubyonrails?
<shortCircuit__>
yohhh sorry
<shortCircuit__>
my mistake
<wasamasa>
what the hell are employeeleaves?
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<wasamasa>
is this a nickname for a psychoactive plant for drugging up code monkeys?
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* apeiros_
would assume absences of employees
<shortCircuit__>
I don't know it was given that way, the leaves taken by employees
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<shortCircuit__>
employee_leaves
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* hanmac1
is a tree now and he is leafing now ;P
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<nanSTA>
Hello!
<nanSTA>
i have a script that outputs a set of numbers and cannot figure out a way to add them up
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<claf>
ok, pastie?
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<nanSTA>
numbers = cc_number.split('').reverse numbers.each_with_index do |item, index| if index % 2 == 1 item = item.to_i * 2 if item > 9 item -= 9 end end puts item end end
<nanSTA>
def luhn_check(cc_number) numbers = cc_number.split('').reverse numbers.each_with_index do |item, index| if index % 2 == 1 item = item.to_i * 2 if item > 9 item -= 9 end end puts item end end
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<hanmac1>
nanSTA: are you looking for Enumerable#map ?
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<nanSTA>
yea
<hanmac1>
because each_with_index does not change the values
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<nanSTA>
can you explain?
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<nanSTA>
if i iterate with each_with_index i cannot sum up my items
<nanSTA>
?
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<hanmac1>
each and each with index does not modifiy the array/list of numbers you have. the values used in "item" are frozen/not modifyable, so item -= 9 does not have any effect
<hanmac1>
you need to use map.with_index instead of each_with_index
<hanmac1>
gregf_: then you do it wrong, because currently you divide the indexes and not the values
<gregf_>
hanmac1: i know i dont need. infact quite a few method calls are not needed. but what i was asking was if i include redundant method call, can i somehow get the code generated for those calls?
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<hanmac1>
gregf_: currently the best way i thought is:
<elemenopy>
sad face :( i've got an app that i need to set the maximum amount of memory it is allowed to consume. i run the app with "ruby xxfilenameherexx.rb" and after about 10 hours of forks and threads it halts the system. how can i specify the maximum amount of memory that ruby is allowed to use as a whole?
<pontiki>
siaw: at what point in the lifetime of the Ticket object do you want date to be set?
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<siaw>
pontiki: a the point when the object is created
<pontiki>
then you need to do it in initialize
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<canton7>
siaw, you put it in the initializer then
<siaw>
immediately the object is created
<canton7>
that's what it's there for
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<siaw>
canton7: that’s what i thought but i was thinking maybe there was a better shorter way
<waxjar>
elemenopy: you'll have to use some tool that monitors memory usage
<waxjar>
and kills/restarts your process if it consumes too much
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<elemenopy>
waxjar, ok let me google a little bit
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<elemenopy>
waxjar, it looks like i need to use god
<shevy>
hey apeiros do you use "def foo(i)" or rather "def foo i" ?
<apeiros_>
shortCircuit__: yes
<apeiros_>
whoops
<apeiros_>
shevy: yes
<apeiros_>
(sorry shortCircuit__)
<shevy>
hehe
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<shevy>
I think I finally understood why some ruby devs use the paren-less form
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<shevy>
object.report_cost_of 'bla'
<shevy>
def report_cost_of i
<shevy>
def report_cost_of(i)
<shevy>
the first def is actually easier
<waxjar>
yeah i think god can do it elemenopy, but there is probably a more lightweight tool to do it
<elemenopy>
dudes / dudettes, this god app is amazing, im reading the crap outta this document and it sounds insane
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<claf>
good god!
<waxjar>
elemenopy: best solution would of course be to fix your memory leak :P
<ddv>
god app?
<ddv>
oh
<ddv>
I would use systemd
<claf>
god monitoring framework
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* hanmac1
wispers to shevy that the default value of a parameter in a ruby function can be a method call ;P
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<hanmac1>
there arent many other languages where the default parameter can be a method call
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<elemenopy>
waxjar, that's the thing it's a data mining tool for a nonprofit site. after about 8 hours it seems to be hitting a gigantic amount of data. so when that thread forks it consumes the machine. maybe i should first measure the length of html downloaded before even touching the data each time perhaps?
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<apeiros_>
aaaah lovely code I found due to a bug (not my code): ((Date.new(today.year, today.month + 1)..(Date.new(today.year + 5, today.month + 1)).select { |date| date.day == 1 }
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<shevy>
so 5 years?
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<twohlix_>
also seems like you generate a lot of shitty dates that way
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<apeiros_>
well, the worst thing is - it breaks
<apeiros_>
it doesn't work when today is in december
<apeiros_>
(which is why the bug surfaced)
<apeiros_>
and yes, it's quite wasteful to iterate 5*365.2425 days to collect 60 of them
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<twohlix_>
apeiros_: yea, you could get a 33x speedup and 33x better memory footprint for that block of code. lol
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<hanmac1>
apeiros_ i think something similar to 60.times.with_object([Date.today.next_month]) {|_,a| a << a.last.next_month } might be nicer
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<apeiros_>
hanmac1: omits that you have to be at the beginning of the month. I didn't think much and just used Array.new(60) + divmod
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<apeiros_>
probably not the nicest variant, but it works and is not utterly wasteful
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<dotix>
Hey guys! Is there any way to get all the nodes from an Nokogiri::Html object?
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<dotix>
i.e. page is "<html><body><h1>Text</h1></body></html>" I want to get "html" and "body"
<dotix>
can't find a solution on google
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<dotix>
oh and "h1" in my prev example.. Forgot about it
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<dotix>
Got it with .traverse on the object
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<marahin>
mozesz jeszcze dojebac .to_string(); (w C++!) i wio
<marahin>
w/c
<marahin>
sorry
<dotix>
but this doesn't respect the order afterwhich they appear... hmm
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<shock_one>
Could you remind me how to create a class with constructor automatically? It's something like ClassName = MagicObject.create_class(foo: 1, bar: 2)
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<shevy>
Hanmac, do you have your projects including the most recent one with the graphs, on github?
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<xxneolithicxx>
hi all, has anyone used the rubyinstaller.org installer before for Windows? Have a qq on how it ends up being setup and really dont want to have to boot a Windows vm to try it: Does it automatically add ruby/gem to the environment PATH so you dont have to fully qualify it?
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<shevy>
yes there is an option during install
<shevy>
if you click it, the path is modified and when you then start cmd.exe "ruby" will work
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<shevy>
same with gem; "gem install bla" will also work
<xxneolithicxx>
shevy: k cool, ty
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<eindoofus_>
if i plan to do web testing for a rails project in the near future where they use rspec, is it better to learn "ruby -> respec -> rails" or "ruby -> rails -> rspec" ?
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<shock_one>
Better do [ruby, rails, rspec] simultaniously.
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<eindoofus_>
shock_one, simultaniously?
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<shock_one>
Aha.
<eindoofus_>
shock_one, i would say it's at least better to learn a language before a framework
<shock_one>
Well, maybe Ruby would be a prerequisite.
<shock_one>
:)
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<shock_one>
RSpec and Rails are quite independent, though.
<eindoofus_>
so rails and rspec go hand in hand? are there any books that actually teach both simultaneously for rails 4?
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<shock_one>
Do you know MVC?
<shock_one>
Any framework, or at least the GoF pattern.
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<blahwoop>
hi
<blahwoop>
who is juuio and why is he sending me weird messages
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<eindoofus_>
i have the same question blahwoop
<[a]foo>
blahwoop: go into #freenode
<[a]foo>
paste his message and tell him he's spamming
<[a]foo>
he'll get banned
<claf>
^
<terrellt>
I'd do ruby -> rspec -> rails
<blahwoop>
ok
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<eindoofus_>
thanks terrellt. i was leaning towards that but wanted to get a second opinion
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* IceDragon
walks in and bows
<blahwoop>
tinder!
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<IceDragon>
I wonder if shock_one, was Shock One, the dnb artist :O
* jhass
places his plate on IceDragon's back
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* IceDragon
uses his tail to lift the plate and stands up
<IceDragon>
>.> I suppose you don't want this back
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<jhass>
nooo, my cookies!
<IceDragon>
Cookies?
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* IceDragon
noms everything including the plate
<IceDragon>
P: delish
<jhass>
:(
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<xxneolithicxx>
is there any way to uniquely identify the specific call of a method (say you call the same method recursively, i need a way to differentiate one from the other). Would it have a unique id or stack address I can use?
<xxneolithicxx>
*not looking to pass in an additional variable to track depth or anything
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<apeiros>
xxneolithicxx: you can use caller
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<claf>
inversion of control patterns in ruby?
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<claf>
node people keep fuzzing over promises
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<claf>
but but
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<xxneolithicxx>
apeiros: thx
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<giuseppesolinas>
Hello
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<lbrf>
giuseppesolinas: o/
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<shevy>
people who aren't stuck on ubuntu can just wget ftp://ftp.ruby-lang.org/pub/ruby/2.1/ruby-2.1.5.tar.bz2, compile it into /usr prefix and be done \o/
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<shevy>
most of these on the list are gems by the way
<jamescarr>
shevy: but why/when did the ubuntu package install all those gems?
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<jamescarr>
I just did an apt-get install ruby1.9.1 and now it wants to install every gem under the sun???
<shevy>
so you have to uncripple it via "apt-get install ruby1.9.1-dev"
<shevy>
apparently their philosophy is "we are a server OS, there is no need for you to compile anything, we provide (10 years old) packages for you"
<eindoofus_>
i'm confused by the use of "self" in this "well-grounded rubyist" example. why does line 21 refer to a class method, while line 25 seems to be for instance methods created through the attr_reader keyword:
<shevy>
jamescarr must be a nightmare to run multiple versions of ruby at the same time on debian
<jamescarr>
shevy: not really. This is inside a docker container
<jamescarr>
otherwise I'd use rvm
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<jamescarr>
I still might have the Dockerfile pull down ruby and compile. The verdict is out on that one for now
<jamescarr>
*pull down a specific version of ruby
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<shevy>
k but if you use rvm then you no longer use ubuntu anyway
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<eindoofus_>
shevy, the PEOPLE array makes sense. it's the "self.public_method_defined?" that is confusing me. is this because class are objects in ruby?
<shevy>
so you won't need apt-get for ruby there
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<shevy>
eindoofus_ no idea. You can also do Person.public_method_defined?
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<eindoofus_>
shevy, does a "public_method" become an instance method in an instantiated object?
<shevy>
eindoofus_ that's just a name
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<shevy>
you can call it "abc?" and it will work the same
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<eindoofus_>
shevy, the separation between classes and instances is driving me nuts. lol
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<eguneys>
How do I solve this: Gem::LoadError: You have already activated i18n 0.6.1, but your Gemfile requires i18n 0.6.11. Prepending `bundle exec` to your command may solve this.
<shevy>
not many methods are interpreted specially
<shevy>
this one should be one "def self.inherited(i)"
<shevy>
eindoofus_ you instantiante from a class
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<eindoofus_>
shevy, what would be the equivalent to check for a class method?
<shevy>
eindoofus_ so the class is the initial blueprint for your object; it even still will refer to it, if you modify the class, the method should exist on your object
<shevy>
class Foo; end; foo = Foo.new
<shevy>
so we have foo instantiated
<shevy>
now we modify class Foo
<shevy>
class Foo; def tester; puts 'hi'; end; end
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<shevy>
foo.tester # hi
<shevy>
and your foo instance has the tester() method
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<shevy>
eindoofus_ hmm
<shevy>
Foo.class.instance_methods(false)
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<shevy>
I am not sure how to obtain class methods; I suppose they are also instance methods, just on some other level
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<shevy>
arup_r nope, large viruses that have about 2.5 million base pairs in their genome. ebola has only 7500 base pairs
* parabolize
is also reading that book. its great.
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<arup_r>
no idea.. About these.. you. shevy, carry on. :)
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<ddv>
dayuuumn shevy is so smart
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<shevy>
arup_r I don't know either, it's not so old a research really; mostly started (or rather discovered) in 2005. up until that point they thought all these viruses would be small
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<cesarstafe>
hi people, a question about "begin .. rescue .. end" is it possible to use only "rescue" avoiding to put "begin & end" inside an ".each" block?
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<apeiros>
cesarstafe: no
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<apeiros>
there is inline rescue (similar as inline if), but you should not use it as you can't specify the exception class.
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<cesarsta1e>
hi people, a question about "begin .. rescue .. end" is it possible to use only "rescue" avoiding to put "begin & end" inside an ".each" block?
<cesarsta1e>
I think that not because I have read that "def .. rescue .. end" works where "def" is the part that works as if it were a "begin"
<cesarsta1e>
but not sure about that
<apeiros>
cesarsta1e: if I answer you again, will you ask again?
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<eguneys>
I can't run `rake db:seed` so I run `ruby db/seeds.rb` does it make a difference? is that wrong
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<apeiros>
eguneys: #rubyonrails, and yes, there's a difference. the rake task ensures everything necessary is loaded and prerequisites are met.
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<eguneys>
apeiros: i have a custom rack based project non rails , and I don't have rake in my Gemfile, it conflicts with my project what should I do. PS: I use standalone_migrations tasks which is not included in the Gemfile
<apeiros>
eguneys: in that case: nobody here has a clue about what your rake tasks code consists of. so *zero* chance to tell.
<apeiros>
read your code
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<eguneys>
it's empty I just include standalone_migrations, and i18n has a conflict
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<apeiros>
eguneys: those are empty words which mean nothing
<apeiros>
by what magic should we know what "standalone_migrations" or "i18n" in your custom rack app does?
<eguneys>
ok the problem is, I require a gem which is not included in my Gemfile and it causes conflict
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<apeiros>
is today jerkday?
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<Hijiri>
but people like the C tutorial that site has
<Hijiri>
because "the hard way is easier"
<aplarcher>
:)
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<aplarcher>
for the ones that know codecademy, is it any good?
<jello^>
Hi. I'm producing templated cfg for an application, for a bunch of environments (i.e. retrofitting cfg mgmt with puppet to an existing infrastructure). I've turned one environment's cfg files into ERB templates. I'm wondering if I can use those templates in reverse to extract the existing cfg values from the other environments' config files
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<jello^>
That is, I can think of the existing cfg as the result of applying some values to the erb templates I have. Can I extract those values from the files by 'unrendering' the ERBs?
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<aplarcher>
gotta go
<aplarcher>
talk to you guys later
<aplarcher>
tks for the info
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<jello^>
I don't know whether to be happy or roll my eyes ;-)
<jello^>
it's just an example of the equivalent with another language's templating system
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<jello^>
although it does occur to me that I could set the template delimeter to <% %> rather than TT's [% %] and just use the perl library this one time...
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<shevy>
and what do you want to extract from the erb? the html code?
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<jello^>
shevy: there is no html code. I think I've explained badly.
<shevy>
hmm but you use erb there
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<jello^>
yeah. so I'm going to produce my app's config files using ERB templates. I've made those templates, by reversing one environment's config into templates and a yaml file - rendering those together produces files equivalent to the original files
<eam>
jello^: shevy is a php user
<jello^>
I have several other environments, each with their own config files, which have the same structure but different values/data
<jello^>
I want to manage them using the same tools, so I want to extract the config values for each of those environmnts. Being a lazy programmer, I thought about how to automate it
<shevy>
eh I abandoned php like 10 years ago
<jello^>
normally you have: a) template and b) data to produce c) result
<jello^>
I have a) and c) and want to use a) to extract b) from c)
<jello^>
does that make sense?
<shevy>
dunno
<shevy>
:)
<jello^>
I should've tried #metallica, huh?
<shevy>
I have only seen erb used as a html generator
<jello^>
erb doesn't generate any HTML, it's just used to template values into it
<xxneolithicxx>
now thats an interesting problem, how many ERB we talking?
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<shevy>
in like sinatra views they use .erb files
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<jello^>
xxneolithicxx: 1 per file... 25 files per environment. 4 environments to do. 1 done (so I have the ERBs made, the yaml for that 1 env, the ruby code and puppet manifest to render them)
<xxneolithicxx>
I would just convert the erb into an insanely large regex if its not that many and then run it against c)
<xxneolithicxx>
wow
<jello^>
but it's fine, the problem still reduces to 1 erb and 1 file
<jello^>
the rest is just doing it in a loop...
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<twohlix_>
what format are your config files in?
<twohlix_>
just various text formats?
<jello^>
twohlix_: an amusing mixture of text formats, from yaml and json through to php code :D
<twohlix_>
yaml is easy to read in and or dump
<jello^>
hence wanting not to care too much about them other than being text with ERB includes
<twohlix_>
so you've got yaml covered i hope
<jello^>
twohlix_: sure, and my values are now in yaml
<jello^>
twohlix_: my instinct is to approach this as a reverse templating, rather than trying to parse/load any of the files
<twohlix_>
right, i read that part too
<jello^>
are you advocating the opposite?
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<twohlix_>
I'm not sure, I've never really sucessfully tried parsing a file from the same template i use to output it :\
<twohlix_>
it sounds like it would be nice and DRY
<shevy>
:D
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<twohlix_>
but
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<twohlix_>
i just dont know.
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<jello^>
re your "compile a massive regex"
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<jello^>
do ERBs in memory actually exist as massive regexes?
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<jello^>
I've never looked at the parser internals
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<apeiros>
jello^: like most template systems, it's converted to native code
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<apeiros>
converting it to a regex makes no sense
<xxneolithicxx>
its converted to a bunch of strings concatted to the same variable
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<apeiros>
xxneolithicxx: strings alone could not express control structures or other code in templates
<jello^>
apeiros: well, it makes a bunch of sense as an intuitive way to create a simple templating system, it's just a slow way to do it compared wth compiling code
<jello^>
tomato, tomahto :)
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<apeiros>
care to show me how something like "hello <%= entity %>!" would look like as a regex template?
<apeiros>
and how you feed data into that regex template…
<xxneolithicxx>
oogly
<shevy>
let's kick him if he can't answer!
<twohlix_>
jello^, my first instinct is to use yaml as much as you can for your config files, it makes it trivial to parse / dump
<shevy>
^^^ the lazy way
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<twohlix_>
also jello^: JSON is the same way as yaml. so your yaml + json files should be covered, its all those other files you've got which are trickier.
<jello^>
twohlix_: I agree, but I've joined this company who have a bunch of legacy tech and I'm making life easier by puppetising the cfg. I'm not going to go and rewrite, say, wordpress's DB cfg (in PHP) to load from YAML - at least, not as a dependency of introducing puppet
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<twohlix_>
well right, thats when you use the regexes :)
<jello^>
(they have a bunch of apps in several languages that make up one 'deployment')
<twohlix_>
but parsing using your templates is the hard part
<twohlix_>
i dont think thats doable :\
<jello^>
intuitively it seems plausible, and a similar templating system in a similar language has support for it
<jello^>
i'm just wondering if a gem exists already
<jello^>
and/or whether anybody has advice or pointers on ways to attack writing one
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<xxneolithicxx>
even with regex, it may not be that straightforward or even doable in a single regex depending how complicated your template is
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<jello^>
actually... it's perhaps as simple as diffing the template vs the cfg file, grabbing just the different characters [not lines], removing the <%= .. %> from one of them
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<rpag>
apeiros, chanserv links to modruby.net when you join btw
<jello^>
and then building the yaml from that is a simple problem
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<apeiros>
rpag: yeah, aplarcher reminded me of that already. sooo bad :(
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<jello^>
xxneolithicxx, twohlix_: thanks, you've been excellent rubber-ducks, I think I have a plan (sadly not involving actual reverse templating)
<xxneolithicxx>
errmm, not really if your template have loops or other logic. is it just plain variable input
<jello^>
xxneolithicxx: they don't, they are just simple substitution
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<jello^>
lots of define('AUTH_KEY', "<%= wordpress.auth_key %>"); sort of thing
<xxneolithicxx>
diff it up then
<jello^>
yeah seems simple enough to do
<jello^>
thanks :)
<twohlix_>
jello^: you've just run into the common problem of outputting a file in a particular format, and reading it in that format. I've never really seen templates for it, always just have the parser and the writer :\
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<jello^>
I'm not sure that IS the problem, but it is A problem
<jello^>
anyway, thanks for helping me think this through
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<twohlix_>
yea, np yay irc
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<jello^>
apeiros: I'm just trying to recall whether ruby regexes have an equivalent to perl' s///e (i.e. evaluating the RHS as ruby code)
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<jello^>
apeiros: if so, it's dead simple to do a simple substitution templating regex...
<apeiros>
jello^: no
<apeiros>
you can pass it a block to execute code. you can't pass it a string.
<jello^>
s{<%= ((?!%>)+) %>}{value($1)}e
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<jello^>
would be fine
<jello^>
in Perl, I mean. I guess there's an equivalent way to do that in ruby.
<apeiros>
not really. also that doesn't take care of control structures.
<jello^>
i.e. matching anything between <%= and %> using a negative lookahead assertion to avoid greedily capturing %>s
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<apeiros>
if all you want is *variable substitution*, which I wouldn't call template, then there are means, yes.
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<apeiros>
String#%, Kernel#sprintf, or String#gsub with a hash as second arg
<jello^>
sure, but I did say "simple substitution templating". I agree with you entirely and I see why it was idiotic to wonder if ERB might be a regex internally given control structures etc
<jello^>
apeiros: nod
<jello^>
you're right and I'm just being overly literal about something that really wasn't my argument
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<shevy>
Hanmac add me to one of your gems!
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<Pro|>
haanmac never sleeps
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<zenspider>
Pro|: he's a ruby script.
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<Pro|>
maybe thats why
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<kaspergrubbe_>
Ruby scripts only sleeps when the GC is marking before a sweep
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<ged>
Wow I never knew about gsub with a Hash. That's great!
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<zenspider>
??
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<zenspider>
oh, as the substitutions? yeah. I haven't used it yet :)
<zenspider>
'lo ged. how goes?
<ged>
Yeah. :)
<ged>
It goes well!
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<ged>
How about with you?
<zenspider>
I'm super. been unemployed for ~2 mo now and it's great.
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<rpag>
zenspider, i thought you were working with tenderlove?
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<zenspider>
rpag: was, when we were both at AT&T, but he (and I afterwards) left.
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<zenspider>
he's at redhat now.
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<zenspider>
I applied. they supposedly liked me, but apparently balked at negotiations. budget, supposedly.
<rpag>
sucks :(
<zenspider>
eh. I'm enjoying the time off. helping our study group. doing a coursera course (I should be doing the final now). hacking on my own stuff.
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<ged>
What're you hacking on? I haven't seen an ANN from you in a while, but then maybe it's just that I don't read ruby-talk as often anymore.
* apeiros
now wonders about zenspider's asking price :D
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<zenspider>
it's not unreasonable
<zenspider>
ged: that's because omnifocus is really really mad at me right now.
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<zenspider>
I've got a big red badge in my menubar with "109" on it.
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<zenspider>
I should be doing that too
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<ged>
Hahaha I know the feeling.
<zenspider>
tho a ton of my stuff is stable now. I need a new project
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<rpag>
ruby is max'ed out for libs
<zenspider>
doubtful
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<ged>
Hardly.
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<apeiros>
far from
<apeiros>
zenspider: write a good barcode reader lib! :)
<chipotle>
hi
<rpag>
without reinventing other attempts it feels like it
<chipotle>
how goes?
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* apeiros
has to resort to jruby+zxing
<apeiros>
and even had to patch that to get it to read binary data qr codes
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<headius>
patch zxing I assume
<zenspider>
rpag: some of those other attempts really need some reinventing. :)
<apeiros>
headius: yes
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<zenspider>
tenderlove had some code to read qrcodes via isight iirc
<apeiros>
it tries to convert the binary data to utf-8. which fails for 0x80-0xff
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<apeiros>
zenspider: I didn't get his to compile reliably
<apeiros>
iirc he relied on an old build of opencv
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<asteve>
if you're storing a key/val pair in a hash table, what method of requesting the table would you expect? pass in a key and get out a val?
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<zenspider>
apeiros: doesn't surprise me
<zenspider>
asteve: requesting the table?
<zenspider>
myhash[mykey] => result
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<zenspider>
gmind: I'll just throw in emacs to balance it out
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<zenspider>
we helped another one!
<shevy>
hehehe
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<xxneolithicxx>
emacs is the only truth, add emacs-goodies and color coding and we are off to the races
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<xxneolithicxx>
who needs stinkin editors with popup and autocomplete garbage
<jello^>
I had a colleague who was really good at emacs
<jello^>
sometimes he even wrote some code
<xxneolithicxx>
lol
<agent_white>
I don't need another OS to try
<jello^>
no yo dawg?
<agent_white>
nonodawg
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<shevy>
it's kinda hard to reason against emacs in ruby. after all matz wrote ruby in emacs
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<giuseppesolinas>
dat feel when forced to use wordpress
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<xxneolithicxx>
you mean ruby in your emacs?
<agent_white>
I puts ruby in my coffee.
<zenspider>
emacs-goodies and color coding?
<zenspider>
you mean... emacs?
<xxneolithicxx>
no emacs-goodies is the RHEL pkg with the support or the additional stuff or some crap like that
<agent_white>
emacs... you mean... vim?!?!
<zenspider>
I don't use OSes that cripple my packages
<agent_white>
\o/
<zenspider>
emacs is emacs
<zenspider>
ruby is ruby
<zenspider>
if they fuck with that because of some dogma, I flip the bozo bit
<terrellt>
agent_white++
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<mozzarella>
u wot m8
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<mozzarella>
they just make extra packages
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<zenspider>
no, they split up the real package
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<mozzarella>
no
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<xxneolithicxx>
who cares, all i know is i always install emacs and emacs-goodies for the extra plugins
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<xxneolithicxx>
all i need is smart indent and color coding and we are off to the races
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<terrellt>
Life would be sad without all my vim plugins.
<xxneolithicxx>
damn kids these days and their f'ing limes and lemons and what not
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<momomomomo>
eh text editor is a text editor; if you’re comfortable with it, great - if not, switch
<zenspider>
xxneolithicxx: I believe I made it clear that I care, but thanks for being dismissive
<xxneolithicxx>
spend more time talking about their awesome editor then writing sane code
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<xxneolithicxx>
diff ppl need diff things, im not being dismissive
<wasamasa>
emacs-goodies?
<xxneolithicxx>
im just saying "I" dont use it
<wasamasa>
haven't come across that one
* wasamasa
reads backlog
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<zenspider>
"who cares" is definitely being dismissive.
<zenspider>
nice thing about IRC in emacs is the /fools list
<xxneolithicxx>
i was being dismissive about the split of the packages, not the editors
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<jenrzzz>
does anyone know of some good resources on perl's design and how it influenced ruby?
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<wasamasa>
perl's design influenced ruby?
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<jenrzzz>
ruby took all the good parts of perl
<jenrzzz>
and none of the bad
<wasamasa>
ok, the terseness and MTOWTDI
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<jenrzzz>
rubygems was influenced a lot by CPAN
<shevy>
well some global variables or strange volatile ones like $1
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<jenrzzz>
they are the only languages AFAIK with the flip-flop operator
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<wasamasa>
but there's no silly sigils or inane internals leaking through or lack of OOP
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<wasamasa>
or the entire business of "A good programming language should approximate a natural language" which is pretty much the only thing about perl you can actually find design resources on
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<jenrzzz>
yeah, i've been looking into that
<jenrzzz>
where are the programming historians?
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<wasamasa>
if you want to hear about that (and some aphorisms), there's a pretty nice larry wall video on youtube
<xxneolithicxx>
reference some college programming languages books maybe? The one I have I think has an interview for Matz
<xxneolithicxx>
jenrzzz: looking at it now, mis-spoke it has bjorne and a few others
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<xxneolithicxx>
jenrzzz: it says Smalltalk, Eiffel, Ada, Perl and Python were the related/basis languages
<wasamasa>
jenrzzz: hmm, didn't know that
<postmodern>
wasamasa, actually metasploit was originally perl, and people convinced them to port to Ruby because Rails was all the rage at the time and perl was dying
<xxneolithicxx>
jenrzzz: Concepts of Programming Languages 8e
<jenrzzz>
xxneolithicxx: yeah, I know that, but I'm trying to dig a little deeper
<jenrzzz>
fuck, i shoulda asked matz at rubyconf
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<jenrzzz>
maybe the truth isn't all that interesting and we should come up with a legend
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<zenspider>
how is that inconsistent? I don't get it
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<tds>
if you have an array that is empty, and you use the single-splat operator to expand that array into a method's argument list, but the method takes no arguments, there won't be a "wrong number of arguments" error, because an empty array expanded results in no arguments
<tds>
if you have a hash that is empty, and you use the double-splat operator to expand that hash into a method's keyword arguments list, but the method take no arguments (keyword or otherwise), a "wrong number of arguments" error is raised, even though an empty hash expands into no arguments
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<tds>
unless i am misunderstanding what the double-splat operator is meant to do, but at least in its current form, it is not a perfect analogue of the single-splat operator