<UserInNeed_>
I'm holding the PickAxe in my hand right now
<UserInNeed_>
I was just assuming that there was a way to do it with celluloid
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<UserInNeed_>
i guess not
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<rietta>
A lot of stuff is not threadsafe. I have no direct experience with Celluoid myself. And classic MRI still has the global thread lock to the best of my knowledge.
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<UserInNeed_>
ok, i'll try just using mri threads
<UserInNeed_>
Celluloid uses real threads thugh, so if one thread deadlocks, then the rest don't freeze
<rietta>
Hope that works. I still don’t know how to write a test for a multi-threaded race condition like there is with the uniqueness validation in some Rails apps.
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<rietta>
It’s nearly impossible to coax the Ruby process to run concurrently.
<rietta>
Because of the GIL
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<UserInNeed_>
gil?
<havenwood>
rietta: The GVL actually releases the lock for IO.
<toretore>
UserInNeed_: as usual with concurrency, you'll have to figure out how to define your problem more precisely before you can have a solution for it
<rietta>
The global interpreter lock - Python and Ruby both use the pattern as do other interpreted languages
<toretore>
UserInNeed_: "async puts" sounds like you want some sort of async sink where you write log or other data
<toretore>
which is then queued to be written
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<UserInNeed_>
no, i want to diplay irc messages while still being able to type
<UserInNeed_>
i'm writing an irc client
<toretore>
same thing
<toretore>
this is why you must identify the primitives to actually get a good solution
<UserInNeed_>
another question
<UserInNeed_>
how can i use curses to get a typing thing to display at the botton of the secreen
<UserInNeed_>
text input box*
<havenwood>
UserInNeed_: Just for the heck of it here's a little Celluloid::IO example you could play with, for what it's worth: require 'celluloid/io'; class MostlyIdle; include Celluloid::IO; def puts *stuff; super *stuff end end; mostly_idle = MostlyIdle.new; mostly_idle.async.puts "the 'why' is a little harder"
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<hfp>
havenwood: Indeed, I didn't think about checking the page. Never happened to me before, I was confused... I updated my bundle and it's fine now.
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<havenwood>
hfp: yeah, yanking causes chaos - hence the RubyGems folk aren't fond o fit
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<havenwood>
There was a gem... and it
<havenwood>
it's gone.
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<UserInNeed_>
here's what i have right now: loop do { while s.gets.chomp { puts; } s.puts gets.chomp; }
<UserInNeed_>
doesn't the thing gets stored in $_ ?
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<UserInNeed_>
also, why is ruby so perlish
<UserInNeed_>
like
<UserInNeed_>
$_ is weird
<eam>
if only ruby had an implicit loop iterator
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<ropeney>
UserInNeed_: Because they make 1 liners in the terminal quick and easy to write, using them in your program is your choice
<UserInNeed_>
ok
<UserInNeed_>
but, like, can you just say
<UserInNeed_>
puts while gets for a simple cat program?
<eam>
UserInNeed_: s.each_line { |l| puts l }
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<UserInNeed_>
loop do
<UserInNeed_>
while s.gets.chomp
<UserInNeed_>
puts
<UserInNeed_>
end
<UserInNeed_>
s.puts gets.chomp
<UserInNeed_>
end
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<Mon_Ouie>
puts $_ while gets
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<UserInNeed_>
ok
<Mon_Ouie>
$_ is not an implicit argument in Ruby
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<cornfeedhobo>
is it not possible to remove something from rubygems.com?
<cornfeedhobo>
is it possible to remove something from rubygems.com?** i don't see any options for it ...
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<mib_mib>
hi - rails question - How would i see the 'generated sql' for a query that is a 'count', i.e. MyModel.where(some: 'thing').to_sql works, but not MyModel.where(some: 'thing').count.to_sql doesnt (since its evaluuated)
<mib_mib>
if anyone knows the 'arel' library...
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<na_g>
mib_mib: you will probably have better luck asking in #RubyOnRails
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<flughafen>
morning
<Radar>
good morning flughafen
<flughafen>
good morning Radar
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<flughafen>
how are you guys/gals doing
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<Radar>
Doing well :) Reviewing the chapters of Multitenancy with Rails currently. At the end of Chapter 3 and looking to add more content to it to cover some things that I missed.
<flughafen>
awesome
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<shevy>
ready for take-off flughafen?
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<flughafen>
ask Radar if he sees anything
<Radar>
I am back in Australia (in Brisbane currently). I won't see anything.
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<EdwardIII>
hmm i'm currently deciding whether to build my app multitenancy or just deploy a different instance for each client
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<EdwardIII>
probably won't exceed around 10 clients so i'm guessing it's probably not worth the extra complexity
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<adaedra>
Hello
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<lipoqil>
adaedra: It's you?
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<adaedra>
?
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<EdwardIII>
Radar: have you made many mult-tenancy apps in the past?
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<norc>
>> p a if a = 1
<ruby[bot]>
norc: # => /tmp/execpad-bb7fbfccfb81/source-bb7fbfccfb81:2: warning: found = in conditional, should be == ...check link for more (https://eval.in/515549)
<norc>
Why does this require parens around the conditional?
<apeiros>
hm? it does not?
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<apeiros>
it warns you that you have an assignment, which likely should be a comparison
<apeiros>
oh, interesting, it's not just a warning
<apeiros>
I think I see now what you meant. weird.
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<norc>
Oh I should know better.
<apeiros>
but a paren doesn't help, a remains undefined.
<apeiros>
this is odd.
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<paul98>
ddv: this is ubuntu and i did the apt-get install ruby-full as well
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<ddv>
paul98: you need to do sudo apt-get install build-essential
<norc>
apeiros: No the parens do help
<norc>
That is the bizarre thing.
<norc>
>> p a if (a = 1)
<ruby[bot]>
norc: # => /tmp/execpad-25efcc80ceb5/source-25efcc80ceb5:2: warning: found = in conditional, should be == ...check link for more (https://eval.in/515554)
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<norc>
But I think I know where to look
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<norc>
apeiros: Ok this is really strange. On my pry shell that actually works.
<apeiros>
norc: in what way did it help?
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<apeiros>
norc: on the second line? :)
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<norc>
Oh.
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<apeiros>
I run it with ruby -e because of that
<norc>
apeiros: No it makes perfect sense now.
<apeiros>
not to me :-/ I mean I can understand how it probably happens, but that doesn't fit with how it should work IMO
<norc>
It is this monstrous lvar cache hack in the parser.
<norc>
Im willing to bet that this will work fine on jruby
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<apeiros>
i.e. IMO that behavior is a bug
<norc>
Not sure whether its even fixable considering how the lvar cache works and that we have a LR parser.
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<apeiros>
dunno. in my language I read the full lexical scope before executing. lvars are stored in an array. the name association is stored elsewhere and only for eval and a local_variable_get equivalent
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<apeiros>
i.e. a code block has full knowledge of all lvars in it before it starts to execute
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<apeiros>
it's probably not the fastest way to work with it, but faster than referring to them by name
<norc>
apeiros: The issue is how Ruby implements shadowing lvars with conflicting method names.
<norc>
So the order in which things are found is rather important.
<apeiros>
ah true. you can all a method before an assignment in the same lexical scope.
<apeiros>
luckily I don't have that ambiguity
<apeiros>
actually s/luckily/by design/
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<paul98>
ddv: cheers it still fails but i've other stuff to be worrying about will pick up on it later! thanks for the pointers
<norc>
def a; 1; end; puts a if a = 2
<norc>
apeiros: what would you expect this to return?
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<norc>
(Honest question)
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<apeiros>
with the current way ruby works, I'd expect it to print 2
<apeiros>
given that the `if a = 2` is necessarily executed before `puts a`
<norc>
Hehe, if lvar resolution and shadowing was done at execution stage in the VM that would certainly be possible.
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<norc>
But that would probably change lexical scope semantics wrt blocks/procs, no?
<apeiros>
it can be done when the AST is built
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<apeiros>
personally I'd favor if the existence of an lvar would always shadow, even before assignment
<apeiros>
that'd probably be unexpected at first, but make things much more clear than the current way where an unexecuted branch can shadow a method
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<apeiros>
(see `ruby -e 'def a; 1; end; if false then a = 2; end; puts a'`)
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<norc>
apeiros: If you resolve var/method at runtime, it would necessitate lvar either always or never shadowing.
<norc>
I think.
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<EdwardIII>
hrm where do i know apeiros from
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<norc>
apeiros: The more I think about it though, the modifier_ keywords are just rather silly for exactly this reason.
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<norc>
Hah. I just looked at parse.y more closely and found some interesting things
<norc>
Mon_Ouie: Interesting, I followed this down the rabbit whole and made some interesting discoveries how and when the catch entries for catch/retry come into existence.
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<kibogol>
How does one install gems to the system /usr/local directory heirarchy?
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<Mon_Ouie>
By default, gem installs to GEM_HOME; you can pass an install directory with -i.
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<apeiros>
norc: with current ruby: no. I'd want it to work, though (and in my language it would)
<xapak>
apeiros, what do you suggest? A variable, add results there, and simply set the variable to the end?
<xapak>
Hmm... let me check that.
<apeiros>
>> [1,2,3].map { |e| "now it is relevant #{e}" }
<ruby[bot]>
apeiros: # => ["now it is relevant 1", "now it is relevant 2", "now it is relevant 3"] (https://eval.in/515655)
<apeiros>
each is for side-effects. map is for return value.
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<xapak>
In my own gist, if I change it to maps, I get the “puts” behaviour of duplicated results. If I run the Dir.glob outside, it works as intended.
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<kibogol>
setting environment variable GEM_HOME did not function as claimed. It put the executables under ~/.gem in spite of that.
<xapak>
apeiros, do you see perhaps why?
<apeiros>
xapak: update the gist
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<sts>
hello folks. When I develop some code on a machine, where the same class is installed system wide, how can I exclude the system wide path for running it from my home directory?
<apeiros>
xapak: also, pretty please use .rb as filesuffix.
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<apeiros>
sts: $LOAD_PATH governs how base require works. Dont' remember which variable controls gem's require, though.
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<sts>
apeiros: can i remove a path from LOAD_PATH?
<unsymbol>
EdwardIII: not sure i understand the question, could you say a little more about what you're trying to do?
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<EdwardIII>
unsymbol: getting a big fat bunch of params that i need to add a few things to, then pass on to an api
<EdwardIII>
if i use **opts i don't get the validation that all params are present and correct (which i want)
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<apeiros>
EdwardIII: it'd be ugly and you'd still have to either use something like binding_of_caller or pass in the method name + binding
<EdwardIII>
ok then
<apeiros>
method(__method__).params gets you the info, and Binding#local_variable_get the data
<kibogol>
Bingo, --user-install is in /etc/gemrc ! Was in...
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<apeiros>
I think I've even written such an abomination once. just to test how ugly it'd be :)
<EdwardIII>
hehe maybe i should just pass it on
<EdwardIII>
ultimately it's going to a soap api, i think savon or the endpoint will complain if something it expects is missing
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<apeiros>
if you have a sane xsd, it should
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<apeiros>
personally I'm a fan of early failure instead of delayed. but sometimes that's just not worth the effort.
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<shevy>
fail early, fail often
<shevy>
- PHP !!!
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<pihpah>
I got this following error while running berks init . Unable to activate berkshelf-api-client-2.0.0, because httpclient-2.7.1 conflicts with httpclient (~> 2.6.0)
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<pihpah>
gem list tells I have two version of httpclient installed
<pihpah>
httpclient (2.7.1, 2.6.0.1)
<apeiros>
sounds like something required httpclient without specifying a version, which activated the newest
<shevy>
yeah it dislikes 2.7.1
<apeiros>
and then something else tried to activate a specific version (~ 2.6.0) which failed because 2.7.1 was already required (activation happens with a gem before the actual require, require does it automatically)
<apeiros>
shevy: stop making me look like I'd like php! :<
<pihpah>
berks init . is he exact command I ryun
<pihpah>
the*
<shevy>
I just thought fit it would fit to php :D
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<pihpah>
apeiros: so, what should I do?
<shevy>
pihpah are you able to use only one httpclient version?
<apeiros>
file a bugreport with berks?
<apeiros>
uninstall 2.7.1?
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<apeiros>
run it with a Gemfile? I don't know.
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<pihpah>
apeiros: uninstall is the solution I guess
<apeiros>
install a newer version of berks?
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<apeiros>
seems I've not gisted that params code. wouldn't be surprised, iirc it was ugly as hell :D
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<gregf_>
i just tried what apeiros said and it does work ;)
<gregf_>
shevy: that is such ugly code. PHP code can be written so much much more better :/
<shevy>
gregf_ :D
<EdwardIII>
shevy: other than this code being disgusting, why did you bring it up though heh? because of 'fail early, fail often'?
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<shevy>
EdwardIII just compare bioperl and biopython to biophp
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<shevy>
then build a castle out of sand
<ddv>
you can make shit in every language
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<EdwardIII>
it'd be nice for there to be a conclusive answer to this so we didn't always have to discuss it heh
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<EdwardIII>
some metric that shows PHP is not as good as the alternatives
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<shevy>
we can use inferior languages to build awesome things
<EdwardIII>
in code complete mcconnell has a table that says if you use vb your project will take longer
<EdwardIII>
(iirc)
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<shevy>
there are always some absolute numbers, like amount of code versus amount of features, ease of readability, maintainability, how much the language itself supports, how big its ecosystem is
<mottel>
I am creating stats for a ticket support system and I am a bit confused. I want to show the number of the tickets that are open and the waiting time for the customer was more than 24 hours. Then the tickets that have a waiting time more than 48 hours and then for 72 hours. I feel that what I did is wrong. Could you please check this (https://gist.github.com/anonymous/b029a6e87571fca3a5b8)
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<ddv>
mottel: #RubyOnRails, also use scopes, don't do that in your view and maybe replace erb with something better like haml or slim
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<mottel>
ddv: Thank you for your help. As I am learning, why should I not be using erb? are there any pitfalls or do others offer more features?
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<EdwardIII>
i just started using erb, new to rails
<ddv>
mottel: lets discuss this in #RubyOnRails
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<NoIdea__>
Hey.
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<NoIdea__>
I'm beginning in Ruby (but I do not need help :D), I'm just here to ask you, is that needed or better too learn C to work (I'm still a student)?
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<gaspaio>
hey all. Newbie question: I have a huge variable declared in a ruby file. How do I load that variable info some other ruby file ?
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<shevy>
gaspaio make it a constant
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<arup_r>
If I do `rvm list known` .. it is not showing the 2.3. What should i do ?
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<EdwardIII>
ah neat, found one on hashtie
<gaspaio>
shevy: thanks a lot, that works.
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<shevy>
\o/
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<arup_r>
nvm, i got it ..
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<shevy>
hmmm what are the advantages of having the toplevel namespace a class or a module? Reason I ask is... I have a class right now as a toplevel namespace in one project while 98% of my other projects use a module toplevel ... so now I am tempted to turn that class into a module, but I can not remember why I picked a class back then.... (some years ago)
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<havenwood>
shevy: Are you creating instances of the Class?
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<havenwood>
shevy: That's what classes are for!
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<shevy>
havenwood I don't know!
<shevy>
but yeah
<shevy>
I think so
<shevy>
but then I lose the possibility to include it! :(
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<pihpah>
`berks install` issues Could not parse `/home/pihpah/github/cookbooks/metadata.rb': undefined method `source' for #<Ridley::Chef::Cookbook::Metadata:0x000000028d37c0>
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<pihpah>
why
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<havenwood>
solars: crontab -l
<havenwood>
pihpah: You might try the #berkshelf channel if you haven't already.
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<pihpah>
I'll give a shot but serisouly, wtf. My day is ruined. It's kind of one installs git, then spends the whole day trying to figure out why `git init .` command does not work. Did that command ever fail you? You doubt that.
<pihpah>
Seems like the Ruby community is driven by half-assed programmers.
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<solars>
havenwood, I meant in ruby, of course :) but found it already, thanks
<yorickpeterse>
pihpah: because one library is a representation of an entire community right?
<havenwood>
pihpah: I don't know what you're going on about. Go gripe to Chef or Berkshelf.
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<havenwood>
pihpah: PS - `git init .` has nothing to do with Ruby.
<DefV>
Linus is kind of a half-assed programmer :-/
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<platzhirsch>
philtr: sorry to hear you have to work with Chef
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<ddv>
so we have another clueless sysadmin who doesn't know how to program but has to use orchestration tools that in reality do require programming experience
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<platzhirsch>
hah
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<shevy>
pihpah some projects are good, others are not so good. it is better to use the good projects and ignore the bad ones
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<platzhirsch>
what the snake said
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<apeiros>
pihpah: you're frustrated, I understand that. but throwing stuff like "Seems like the Ruby community is driven by half-assed programmers." is neither productive nor otherwise a good idea, especially in a channel of the ruby community.
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<apeiros>
(leaving the whole "single datapoint extrapolation" stupidity aside)
<shevy>
"Install redis (on OSX with homebrew use) brew install redis"
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<shevy>
that's a quite OSX centric installation guide right? does gem not work on OSX or why not generalize this via "gem install redis"?
<apeiros>
yupp, that's osx centric.
<apeiros>
it's an external dependency
<havenwood>
shevy: They're trying to show installing the Redis package.
<yorickpeterse>
shevy: They're probably referring to the Redis server, not the Gem
<apeiros>
the gem won't work anywhere else either if you don't have redis installed.
<apeiros>
and as yorickpeterse says, redis ain't a gem :)
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<dajobat>
Just out of interest, what's the general consensus with respect to brackets around conditionals in if statements?
<dajobat>
Should they always be there/ only be there if there are multiple conditions/ never be there?
<apeiros>
dajobat: preferably never
<apeiros>
having to put some there is IMO an indicator that you should probably break a large conditions apart.
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<dajobat>
cool, seems reasonable
<dajobat>
apeiros: Cheers.
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<EdwardIII>
hrm i'm using savon which uses gyoku, it says you can pass in convert_request_keys_to: :camelcase, but it doesn't seem to do anything
<EdwardIII>
trying to diagnose it now but it's a little tricky heh
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<EdwardIII>
hrm trying to step through the whole request cycle is taking a looong time with byebug, is there a way i can say 'just break if you hit anything in this file'? or even better, 'if the ruby filename matches glob *gyu*'?
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<EdwardIII>
hrm i see i can break on class:method, i'll give that a spin
<shevy>
yorickpeterse ah I see
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<EdwardIII>
do you guys actually use something like byebug for all your debugging? or do you hook it into vim, use an ide or whatever?
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<centrx>
EdwardIII, I don't use anything special for debugging
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<EdwardIII>
some good stuff in that article whether you use puts or a proper debugger
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<adaedra>
I personally use pry + pry-byebug
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<EdwardIII>
i love actual debuggers
<EdwardIII>
like just then, once i figured out how to use byebug properly i could dip into the guts of savon and find that i just needed to ensure i used symbols for my keys or it wouldn't bother to camelise them
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<shevy>
EdwardIII I don't need much debugging for my own code, sometimes I make use of pp though
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<Smcdrc>
I love awesomeprint gem. It is usually one of the first gems I install
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<alexis>
Hi everyone.
<alexis>
I'm trying to install a specific gem and have issues with it, after some search I'm not more advanced, so I figured I would ask.
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<alexis>
When trying to install the gem named "curb", I have some failures.
<alexis>
I've been successful at installing the same gem as packaged for debian
<alexis>
I would need to find a way to link the gem that I installed with debian to my "bundle".
<alexis>
OR to fix the dependencies (I guess) in order for the gem to compile
<alexis>
Anyone got ideas about that?
<alexis>
Thanks for your time.
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<shevy>
you can put what you tried into a pastie
<shevy>
(remote one)
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<shevy>
Fetching: curb-0.9.1.gem (100%)
<shevy>
Building native extensions. This could take a while...
<shevy>
seems as if you must compile it so you may need some headers
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<alexis>
yeah, I think I installed them.
<alexis>
here is the output of the "bundle install" command
<alexis>
Here I use the default versions provided with debian 8.
<alexis>
That is ruby 2.1.5p273 (2014-11-13)
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<alexis>
and libcurl4 7.38.0-4
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<shevy>
yeah for some reason it does not want to continue to compile it for you
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<alexis>
Does anyone know a way to include an already installed gem to a bundle?
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<chrisarcand>
alexis: 'Adding to a bundle' is just bundler adding it to its lock file. The gem can already be installed with whatever path you have set.
<chrisarcand>
ie if you installed the gem and add it to your bundle, you'll notice Bundler outputs 'Using 'the_gem' (version)' instead of Installing...
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<wtiger>
Hi!
<wtiger>
what are some good os ruby projects for a beginner to contribute to?
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<wtiger>
*os = open source
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<alexis>
chrisarcand: I installed it with apt, so I suppose it's not in the PATH bundle is looking for?
<alexis>
chrisarcand: how can I tell bundle to look at the correct location?
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<chrisarcand>
alexis: I'm not the most familiar with how bundler/rubygems pathing works, especially with ruby via apt, but you'll want to look at `gem environment`, `which ruby`, `which gem` etc and make sure all looks correct.
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<crime>
the zen of python is just jihadism, making everybody do something one specific way
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<azure32>
thats one way to put a very negative spin on something
<centrx>
python is murder
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<eam>
ideological cleansing
<crime>
I mean, jihadism isnt necessarily explicitly negative, depends on who's talking. I'm just saying that it's nice to do things your own way
<eam>
crime: you'd like perl
<crime>
If we were a bunch of jihadists, that'd be just swell
<azure32>
lol
<eam>
Coders Going Their Own Way
<crime>
perl is ok, I think perl-ers have already killed perl6 tho
<crime>
which is a shame
<azure32>
this is the first thing I see when I log on in the morning
<azure32>
XD
<crime>
good morning
<eam>
good morning everyone
<azure32>
good morning!
<crime>
i just dropped by to talk ruby and commit crimes
<crime>
ya know, the usu'
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<azure32>
typical day at the office, dontcha know
<EdwardIII>
i kinda like python's exception love
<EdwardIII>
makes it easier to avoid accidents
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<azure32>
^python has its uses
<eam>
I like that python is ref counted
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<crime>
ya know, on the other side of the jihadist coin, there is potential for an argument that TIMTOWTDI is basically just hedonism, right? no moral baseline for implementation
<crime>
what language would a buddhist write? probably asm or C?
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<eam>
lisp
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<eam>
purity of form
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<EdwardIII>
something with no state seems a bit more zen
<gizmore>
crime: intercal
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<azure32>
they want a higher state of being, not lower
<crime>
i love lisp but hate emacs
<crime>
yeah, no state for sure
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<crime>
i was sort of thinking erlang. let it crash resonates with personal mindfulness, right?
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<acidrainfall>
How can I check if a variable is empty?
<acidrainfall>
Anything I append to the array (.defined? .any? etc) complains about NilClass.
<acidrainfall>
I want to say "If you're going to complain about NilClass, just skip it."
<eam>
.nil?
<acidrainfall>
:/
<eam>
>> nil.nil?
<acidrainfall>
yay
<acidrainfall>
thanks.
<eam>
where's the bot :(
<acidrainfall>
I ate it.
<eam>
well drat
<acidrainfall>
ah perfect thank you so much
<acidrainfall>
I don't know why that was so hard to find, I was probably asking the wrong question
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<crime>
.empty?
<crime>
oh a variable
<eam>
crime: .empty? will be true for [], but raise for nil
<crime>
yup
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<acidrainfall>
yeah I tried .empty.
<acidrainfall>
.nil is what I needed
<acidrainfall>
I'm defining arrays at the top and will offer a selection as part of this script, but my syntax checker complains that I have variables I'm not using anywhere else in the script.
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<acidrainfall>
If there are 4 host groups and the selection only allows for one, there will always be 3 variables that exist with data but aren't used. That's not a problem is it?
<eam>
acidrainfall: nil is also false, so you can use it directly in a conditional
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<acidrainfall>
Oh really?
<acidrainfall>
I didn't know if that worked in ruby or not
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<eam>
if whatever; not_nil; else either_nil_or_false; end
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<yqfvwal>
Hi! Is there syntactic sugar to manipulate a variable, with a default value before being used?
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<crime>
like var = var || 5?
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<crime>
because that'd be var ||= 5
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<alexis>
Thanks all. See ya
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<yqfvwal>
crime, I want to set var to zero if not defined otherwise increment it by one
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<baweaver>
that sounds like a programming construct
<crime>
if var.nil? var=0; var+=1
<baweaver>
something conditional
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<yqfvwal>
yes, I know, but I thought there was some other possibility than using conditionals, but thanks
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<crime>
but it IS a conditional, since you have a condition that you are checking for
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<baweaver>
v = v ? v + 1 : 0
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<baweaver>
still an if branch though
<baweaver>
ternary, but semantics
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<yqfvwal>
baweaver, thanks, did not think about
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<yqfvwal>
baweaver, ARGF.each { a = a ? a + 1 : 0 } does not work
<yqfvwal>
puts a, Name error
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<crime>
are they strings?
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<baweaver>
what's the actual error?
<baweaver>
because that each isn't going to work
<apeiros>
yqfvwal: you only set a inside the block
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<apeiros>
it won't exist outside
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<yqfvwal>
apeiros, ah ok, how do I make it global?
<baweaver>
that too
<apeiros>
also it'll be overridden on each iteration anyways
<baweaver>
never global
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<yqfvwal>
hmm, ok, seems the best way to initialize a to zero before using each on argf
<crime>
map!
<baweaver>
no
<apeiros>
yqfvwal: .each_with_index { |line, a| …
<baweaver>
yqfvwal: what's the entire code?
<baweaver>
!gist
<baweaver>
?gist
<ruby[bot]>
https://gist.github.com - Multiple files, syntax highlighting, even automatically with matching filenames, can be edited
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<crime>
yeah paste your code somewhere
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<baweaver>
don't use ! methods
<apeiros>
yqfvwal: but for your approach - why didn't you set `a` outside the loop instead of testing on every single iteration whether it exists?
<crime>
i cant wait to see whatever this is
<baweaver>
there are exceptions but more of a headache in most cases.
<baweaver>
without the entire context most of this advice is probably bad.
<yqfvwal>
It was just some experimenting. I wanted to increment a variable, everytime an enter is pressed, and write it on stdout
<dajobat>
Cheerio all
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<yqfvwal>
a = 0;ARGF.each {a += 1};puts a # this is all I want to do
<marxarelli>
yqfvwal: ARGF.each.reduce(0) { |a| a + 1 } would probably work well for you
<baweaver>
a = 0; loop do gets && a +=1 end
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<baweaver>
marxarelli: won't work
<baweaver>
reduce takes two arguments to the block
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<baweaver>
that'll just treat it as one array
<marxarelli>
blocks don't have strict arity
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<baweaver>
try it
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<marxarelli>
i did :)
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<marxarelli>
|*a| would expand the block arguments to an array, but not |a|
<newbie22>
Hello everyone
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<marxarelli>
blocks don't enforce their arity. i.e. (proc {}).call(1, 2, 3, ...) executes fine
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<marxarelli>
lambdas do, however
<marxarelli>
i.e. (lambda {}).call(1, 2, 3) raises ArgumentError
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<Devalo>
Hello. I have a file with lines of text, and I want to delete a specific line. (todo-app). Gisted method: http://tinyurl.com/j3eljw9. So what I'm trying to do is create a temporary file, read my "db-file" with lines of text, and push all lines of text except the one with the specific index. I call the method with Todo.new.delete(ARGV[1]). What happens is the whole file gets erased instead of the particular line, and "012" gets stored i
<Devalo>
n the file. I feel like I'm close, but I'm not sure how to solve this. Any pointers?
<baweaver>
not common I don't pass the iterator with it :)
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<Devalo>
apeiros and crime: Thanks. That's perfect. I've been staring at this for too long.. lol. Thank you so much for your help.
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<apeiros>
Devalo: IMO readlines + delete_at is still easier ;-p
<crime>
Devalo: <3
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<Dave321>
In Ruby 1.8.7, is it possible to get the backtrace of a thread if you have an instance of the thread object?
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<dangeranger>
.
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<eam>
Dave321: you could raise it
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<Dave321>
eam: true, but I don't want execution to halt on my thread, I want to figure out what's going on in the thread
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<apeiros>
Dave321: an object does not have a backtrace
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<Dave321>
apeiros: the thread instance has a backtrace in newer versions of Ruby, but the method doesn't exist in 1.8.7. I was checking if there was an alternate way to get this information
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<apeiros>
you could try to use set_trace_func and eval "Thread.current" via the binding
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<apeiros>
actually it'd be plain Thread.current. and only work if the callback is invoked in that thread
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<acidrainfall>
I know ruby isn't a scripting language per se, which is hard for me
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<acidrainfall>
But I'm trying to learn it by applying my present needs
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<acidrainfall>
So I'm writing a script that kicks off a cluster restart for elasticsearch. I took an existing script that was written for ES 1.x and updated it for 2.x, added a bunch of validation it didn't have, and now I'm adding in some arrays of hostnames and want to offer a selection.
<acidrainfall>
So script would run, say "Which cluster?", and you'd get 1, 2, 3 (for example), and once you've selected which one you want, the script will restart that cluster.
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<pushcx>
Sounds like a great use for Ruby.
<acidrainfall>
It's going really well so far.
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<acidrainfall>
The script itself works really well, but without a cluster selection option.
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<acidrainfall>
How would you do it? I want something like `answer = gets; cluster = ##{answer} ?
<pushcx>
Sounds like you want to check ARGV or use `gets`
<acidrainfall>
or something like that?
<acidrainfall>
gets is perfectly fine
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<acidrainfall>
It's how to assign the array properly
<pushcx>
cluster = gets.chomp.to_i
<crime>
^
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<acidrainfall>
Well
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<acidrainfall>
hold on let me get you a code example
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<hightower3>
Hey, I have a Ruby source file with documentation in comments, using notation like @param, @result, @override etc. Which markup library/language is that?
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<acidrainfall>
So, there are 3 arrays, and I want a numeric answer to result in the variable `cluster` getting the value of one of the 3 arrays, based on user selection.
<acidrainfall>
Am I making sense? :(
<acidrainfall>
This is harder to describe than I figured.
<hightower3>
adaedra, that's right, thanks
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<crime>
acidrainfall: when you say 'the value of one of the 3 arrays' do you mean a single element from one of the arrays or one of the arrays as a whole?
<acidrainfall>
crime: the entire array.
<acidrainfall>
OH
<acidrainfall>
You know what, I got it.
<acidrainfall>
Does ruby have `case` ?
<crime>
yes
<acidrainfall>
that's what I need.
<crime>
case some_condition
<adaedra>
?cheatseat
<ruby[bot]>
adaedra: I don't know anything about cheatseat
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<adaedra>
?cheatset
<ruby[bot]>
adaedra: I don't know anything about cheatset
<acidrainfall>
I was looking for a stupid one-liner when there probably wasn't one.
<acidrainfall>
cheatseat? hah
<adaedra>
grah, how do you write that
<acidrainfall>
cheatsheet?
<acidrainfall>
?cheatsheet
<ruby[bot]>
acidrainfall: I don't know anything about cheatsheet
<adaedra>
duh
<acidrainfall>
:(
<crime>
?skynet_plans
<adaedra>
ah, we don't have that?
<ruby[bot]>
crime: I don't know anything about skynet_plans
<crime>
hmmm
<acidrainfall>
Suuuuure you don't.
<adaedra>
liar, ruby[bot].
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<acidrainfall>
beep boop.
<crime>
?three_laws
<ruby[bot]>
crime: I don't know anything about three_laws
<crime>
!!
<crime>
dangerous
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<BraddPitt>
something more robust than Thor or similar, like a full on framework aimed at making tutorials/running against a test suite
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<Ox0dea>
BraddPitt: Extract the relevant code from the Koans?
<crime>
acidrainfall: all you gotta do is have an array list_of_clusters or whatever, with each element in that array being one of your lists of cluster occupants, than you can just say something like list_of_clusters[answer.to_i - 1]
<acidrainfall>
crime: That would work too, good point.
<acidrainfall>
Thank you.
<crime>
of course
<acidrainfall>
I'll see which one comes out cleaner
<crime>
I like to do things in one line, but yeah, whatever is best to u
<BraddPitt>
Ox0dea I meant a framework for building my own
<BraddPitt>
if that makes sense
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<crime>
BraddPitt: you could use Highline for CLI, whatever you want for testing, and build your thing
<BraddPitt>
thanks crime, looks like I'll build my own
<crime>
it'll come out great :)
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<BraddPitt>
followup, does anyone know of something similar that uses (n)curses?
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<BraddPitt>
or is that asking for a whole world of trouble?
<crime>
a gem, or an application?
<BraddPitt>
gem
<crime>
dispel is a gem that is supposed to cure curses, mostly complete but not maintained much any more
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<BraddPitt>
hm
<BraddPitt>
ok
<crime>
ruco text editor is built with it
<BraddPitt>
i'll forego it for now
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<acidrainfall>
At the `else`, how can I force it to go do a gets again?
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<acidrainfall>
If they don't put in 1, 2, or 3, I want it to say 'Nope, select again.''
<crime>
acidrainfall: put cluster_select
<crime>
where else is
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<crime>
it can call itself
<acidrainfall>
would that break the `elasticsearch_cluster = cluster_select()` ?
<crime>
and at the beginning it should check to see if the string is one of the ones you want
<acidrainfall>
That was my first though.
<acidrainfall>
thought.
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<claw>
hey guys ? "<foo:attr name="size" value="1929927113" />" how to get the value of value with nokogiri
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<crime>
no, that just aliases elasticsearch_cluster to your method here, it can still call itself
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<acidrainfall>
cool
<acidrainfall>
`def cluster_select` is a method?
<crime>
yes
<acidrainfall>
well, cluster_select()?
<acidrainfall>
I was wondering what the right term for this was.
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<crime>
what i was getting at before though is that if you write it this way, when you want to add more clusters, they're hardcoded into this in a sense, whereas if you had an array of them, all you'd have to do is add to that array and pick an index
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<acidrainfall>
hm
<acidrainfall>
okay
<crime>
like if you had a list_of_clusters array, that array could be thousands of objects long
<crime>
and you would still only need a couple lines of code to do it
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<crime>
but doing it this way, if you had a thousand objects to check for, that's basically a thousand or more lines you have to go write
<claw>
got it : x.xpath('newznab:attr[@name="size"]').attr('value').text
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<crime>
acidrainfall: to clarify though, I'd still have your other lists, apollo, engine, enginestg, etc. put those lists in your list_of_clusters by name, so you would know which sub array is which. so list_of_clusters[apollo, engine, enginestg]
<acidrainfall>
line 1 in the paste is line 3 in the script
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<BraddPitt>
shevy /w 3
<BraddPitt>
oops, sorry
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<shevy>
acidrainfall is this method not known?
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<acidrainfall>
the method seems fine
<acidrainfall>
I figured it out.
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<acidrainfall>
It didn't have a definition for list_of_clusters because I wasn't passing it in.
<acidrainfall>
Things I have to get used to - scopes are very strict in ruby
<yqfvwal>
Why is def def = 42 not an error?
<Mon_Ouie>
It is though
<Mon_Ouie>
>> def def = 42
<ruby[bot]>
Mon_Ouie: # => /tmp/execpad-23654122b336/source-23654122b336:2: syntax error, unexpected '=', expecting ';' or '\n' ...check link for more (https://eval.in/515926)
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<yqfvwal>
Mon_Ouie, ok that is weird, in irb it does not say anything
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<pushcx>
yqfvwal: in irb it's waiting for the 'end' to throw the error
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<Mon_Ouie>
IRB uses a simpler tokenizer to know if the input is terminated, you probably to enter 'end' once or twice for it to detect it
<Mon_Ouie>
probably need to*
<yqfvwal>
Mon_Ouie, ah I see, thanks
<xapak>
Is there any relatively reliable implementation of a pragmatic “Dir[path].empty?”? So far I’m simply listing entries and not counting the “.” and “..”, but I’m not sure if that’s the proper way. :(
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<acidrainfall>
Awwwwwwwwwwwwwwwwwwww yeah
<acidrainfall>
This is getting FUN
<acidrainfall>
I just used an until loop
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<yqfvwal>
In the book "Well-Grounded Rubyist" it is written that one could potentially name a method def. How would one achieve that?
<acidrainfall>
lol
<acidrainfall>
"it is written that"
<acidrainfall>
you make it sound like a religious text
<Ox0dea>
xapak: You could use Dir.rmdir and exceptions as control flow. :P
<yqfvwal>
acidrainfall, I am sorry, english is not my native language. How would I word that better?
<yqfvwal>
Ox0dea, cool thanks
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<shevy>
xapak I think . and .. may be dropped in future releases of ruby, there is some discussion on the bug tracker
<acidrainfall>
yqfvwal: Oh, there was nothing wrong with it. I just found it amusing.
<Ox0dea>
yqfvwal: In general, you can name a method whatever you like; it's calling it that becomes tricky if you've given it a name that conflicts with a keyword or the like.
<acidrainfall>
yqfvwal: Your question was very well worded.
<xapak>
shevy, yeah, there should be a pragmatic approach, or another method: real_empty?, so purists don’t start hating change on entries?
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<shevy>
hehe
<Ox0dea>
They won't be dropped; there's discussion of an option to ignore them.
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<xapak>
Much, much better. :D
<Ox0dea>
floatingpoint: Ruby spells it `elsif`.
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<floatingpoint>
so you're telling me i have to fork ruby to get the correct syntax?
<Ox0dea>
Wat.
<floatingpoint>
elseif isn't even a word
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<shevy>
floatingpoint stop
<Ox0dea>
Alternatively, keep going.
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<shevy>
nah adaedra already got his eyes on him
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<shevy>
<floatingpoint> bash is, quite possibly, the worst
<shevy>
<adaedra> do you have anything interesting to discuss or are you here just for the troll?
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<shevy>
it'll be 50 more lines before a ban ... do you really wanna go through that Ox0dea :(
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<shevy>
what was the dude with the beard again...
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<acidrainfall>
hah
<acidrainfall>
I thought `else if` does work?
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<adaedra>
if you use else if, you have to close twice, I guess.
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<acidrainfall>
Odd.
<acidrainfall>
elsif doesn't bother me anyway
<adaedra>
Not at all.
<acidrainfall>
oh I see
<acidrainfall>
you're right it's not odd
<adaedra>
else keeps the first if "open", and your second if opens a new one.
<acidrainfall>
it's else { if (thing) { } }
<acidrainfall>
yeah that makes sense.
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<adaedra>
C++ "else if" is in fact application of the optional {} on 1-statements clauses on if/else
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<acidrainfall>
In English that means...? :(
<shevy>
lol
<shevy>
you must have written that with a french accent adaedra :)
<adaedra>
`if (a) {} else if (b) {}` is the same as `if (a) {} else { if (b) {} }`
<Ox0dea>
acidrainfall: There's really no such thing as "else if" in language where it's spelled that way.
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<Ox0dea>
*languages
<Ox0dea>
It's just an `else` with an `if` attached.
<shevy>
ok acidrainfall now I also don't know what that means
<adaedra>
shevy: I dônt sée whàt yoú mæn.
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<shevy>
the () caught me off-guard, like a sneaky lisp attack
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<Ox0dea>
adaedra: `else if` is never the right call in Ruby.
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<adaedra>
Ox0dea: I know. I was just explaining C++ way of doing it, as someone mentioned it earlier.
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<Ox0dea>
Right, but "the C++ way" can't be grafted onto Ruby.
<shevy>
matz does not like C++
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<Ox0dea>
You could make an `else if` syntactically valid, but you'd be in for a surprise if you tried to use another one right after.
<adaedra>
right.
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<havenwood>
shevy: "And after two years of C++ programming, it still surprised me."
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<shevy>
my own code surprises me still too!
<adaedra>
tbf, after so many years, Ruby still surprises me.
<shevy>
hah!
<adaedra>
sometimes thanks to Ox0dea.
<havenwood>
shevy: It fails the principle of least Matz surprise.
<adaedra>
:D
<shevy>
Ox0dea's code is deliberately scary
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<shevy>
it's like you are in university and you learn all about the fancy stuff. then you go to work and notice that work is totally different from what you learned
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<adaedra>
Seems you can totally use a language without mastering every aspect of it.
<acidrainfall>
adaedra: I see that you've excluded the circumflex
<adaedra>
acidrainfall: it's the hardest one to type on my keyboard.
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<acidrainfall>
Ox0dea: adaedra: shevy: So if (condition) { action } else { if (condition) { action } } is the expanded else if logic
<acidrainfall>
adaedra: aren't they phasing the circumflex out?
<adaedra>
no
<acidrainfall>
I saw something about that, a few french/belgian friends of mine were freaking out about it
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<adaedra>
it's a 25 years old reform which concern only o and i letters iirc, and only if not making the sense of the word change. Furthermore, old spellings are still valid.
<acidrainfall>
interesting
<acidrainfall>
The actual construction of French is so much more controlled and complicated.
<acidrainfall>
English is very laissez faire.
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<adaedra>
If you are interested in the discussion, I invite you to continue in #ruby-offtopic
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<acidrainfall>
Naw I'm done. :)
<acidrainfall>
Thanks for the help with my Ruby issues, my script is working splendidly.
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<shevy>
<adaedra> Seems you can totally use a language without mastering every aspect of it.
<adaedra>
correction then: it's u and i.
<shevy>
adaedra yeah!
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<shevy>
I use a mini-ruby subset of ruby
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<shevy>
-> is BANNED
<shevy>
lonely operator is BANNED
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<adaedra>
You mean, you're using ruby 1.8 ?
<shevy>
I would if I could!
<shevy>
but it is a fossil version now :(
* adaedra
shrugs
<shevy>
I'd like to try 1.0 but it does not compile for me