<jamiejackson>
(i just updated the gist to fix the path in the comment at the top of the test file)
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<Sh4D0wD_>
jamiejackson: sound like RoR question to me
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<Sh4D0wD_>
With that said we have brotherhood rails community that are specialized on rubyonrails. Ask the question there they could help you faster, link and channel name is in topic
<Radar>
Sh4D0wD_: What if I told you that they were already asking there, but decided #ruby was a better fit?
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<strass_>
c-c yeah using bundler
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<Sh4D0wD_>
Radar: well then we going refer you to each until we get stack overflow and world crash, just kidding, unless someone else can help you, I will once I get home, my hands freezing typing outside
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<Sh4D0wD_>
*each other
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<strass_>
c-c I `gem uninstall -all`'d and the re-`bundle install`'d
<strass_>
and I think I'm set
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<Sh4D0wD_>
strass_: very good, look at you go!
<strass_>
look at me now, dad ;)
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<dminuoso>
al2o3-cr: First binding a block to a proc/lambda itself is more expensive because it involves object creation. Next up yield is a keyword directly glued into Ruby, whereas block.call uses the generic method dispatch mechanism which is slow.
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<dminuoso>
Under the hood they end up doing the exact same thing, except binding the block to a proc costs overhead, and method calls cost overhead.
<dminuoso>
(Effectively a proc/lambda is just an object with a block attached to it so...)
<al2o3-cr>
dminuoso: ok great, thanks for the explaination i'm trying to really learn ruby to it's full potential
<al2o3-cr>
not just messing about with bits and bobs
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<nofxx>
zenspider, which as in /bin/which ? it's 'gst' gnu smalltalk
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<zenspider>
nofxx: I'd recommend pharo smalltalk
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<sts>
I'd like to ship a ruby cli application including its gems in a package. How can I best load the required gems (eg. using bundler?) without installing them in a sytem wide ruby LOAD_PATH?
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<manveru>
sts: you can set GEM_HOME for your app
<manveru>
before you require anything
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<is_null>
hi all !! for some reason i still have the 1.13.5 version of bundler even though the explicit installation of 1.12.5 passes ! http://dpaste.com/3KNNYX7 any clue please ?
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<toretore>
is_null: gem list bundler
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<zenspider>
is_null: 1.12.5 < 1.13.5... it always picks up the latest by default
<is_null>
niceeee, thanks
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<testuser2>
hi
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<testuser2>
i am doing array = [one, two, three] how can i add four and six onl if condition matches?
<testuser2>
append*
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<agent_white>
dminuoso: That little bit above about concurrency/blocks... +1. I got some learning listening to that.
<dminuoso>
testuser2: I recommend a ruby book of your chosing.
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<tdump>
I'm trying to solve a project euler problem. I thought it was straight forward, but my code is hanging during a while loop, and I'm just not seeing what the issue is. Could someone give me a hint? Code is at https://git.io/v1PNX
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<Gravious>
tdump, the hanging issue is likely due to that being quite an inefficient way to calculate primes
<Gravious>
tdump, if you add a puts(x) in the loop body, you'll see it's running
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<tdump>
Gravious cool. I should have thought of that. i thought there might have been something wrong with the logic or syntax. I'll try to make it more efficient. Thanks
<Gravious>
tdump, that's ok glad it helped :)
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<tdump>
Gravious i changed the range to 2..(arg / 2) and it's way faster.
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<Gravious>
:)
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<wtf_rspec>
If I run default rspec like `rspec --pattern "**{,/*/**}/*_spec.rb"` some of my (serverspec) tests fail. but if i run with a very specific .rb file such as `rspec spec/path/to/test__spec.rb` it passes. Does anyone have any insight on this?
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<dminuoso>
wtf_rspec: Do you do any test setup with missing or incorrect teardowns that provide tests with a bad state if run in the wrong order?
<dminuoso>
(If that makes any sense)
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<wtf_rspec>
dminuoso: aha! yeah i just tried removing every other test and now the "broken" one is passing regardless
<wtf_rspec>
so it is definitely some sort of dependency being messed with in another test
<wtf_rspec>
thanks dminuoso :) sometimes it's right in front of you and you don't see it, ha
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<dminuoso>
wtf_rspec: No worries. That was one of the first issues I had with rspec on my rails project - now I use transactional fixtures to ensure that every test is wrapped in a transaction that is rolled back at the end - to ensure that every test sees the same "initial seed state database" in the same way.
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<dminuoso>
Instead of a test leaving the database in a dirty state
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<wtf_rspec>
oh nice. That sounds like something I should do especially now with these tests touching things I didn't expect. Probably should do it regardless ha
<dminuoso>
wtf_rspec: Is this for a rails application?
<dminuoso>
wtf_rspec: if so the generated rails_helper should set transactional fixtures by default.
<wtf_rspec>
dminuoso: No, it's for some docker containers that I'm validating through serverspec. But some tests are affecting more containers than I expected. Thanks for the link though. That might come in handy on some other stuff.
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<newdan>
Even though my Rakefile has require 'shellwords' at the top, I keep getting NoMethodError: undefined method `shelljoin' when I try to run tasks
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<newdan>
Even weirder, I can do load 'Rakefile' in irb, then Rrake::Task[:sometask].invoke and it all works as expected
<newdan>
(well, assuming I spell Rake correctly)
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<newdan>
Oh, huh. I guess newer versions of Rake just don't have FileList#shellwords
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<newdan>
Or older versions. Versions different than the one I had been using
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<matugm>
Hello, is there a way to step through the execution of the Ruby VM? I know you can see the instructions with InstructionSequence, but I want to be able to see the values on the stack.
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<matugm>
I'm looking for the low-level stuff, not just stepping through application code :)
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<matugm>
Been playing around with gdb all day, but not sure where should I set a breakpoint or where exactly I should be looking.
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<dminuoso>
matugm: Give me a moment, Ill show you.
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<matugm>
Ok :)
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<suchness>
I am trying to install an app on a server and am running into quite a strange error. When trying to run migrations, I am getting this error: libruby.so.2.1: cannot open shared object file: No such file or directory - /srv/www/api/shared/vendor/bundle/ruby/2.2/extensions/x86_64-linux/2.2/tiny_tds-0.9.5.beta.10/tiny_tds/tiny_tds.so However when looking on the server the file does exist there. Does anyone have some insight on t
<suchness>
his?
<suchness>
xposted
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<dminuoso>
matugm: the VMDEBUG macro is what you want to compile Ruby with.
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<dminuoso>
suchness: My first instinct: Is perhaps something like apparmor being annoying? What does syslog say?
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<dminuoso>
suchness: also what does "file /srv/www/api/shared/vendor/bundle/ruby/2.2/extensions/x86_64-linux/2.2/tiny_tds-0.9.5.beta.10/tiny_tds/tiny_tds.so" return? Copy paste this - do not type or tab complete.
<suchness>
dminuoso: I got the answer in the other chat, it's my ruby version looking in the wrong place.
<dminuoso>
suchness: just dont crosspost. no issue can be *that* urgent you need to simultaneously ask in a gazillion places. if it was, hire a consultant.
<suchness>
dminuoso: Fuck yourself asshole.
<dminuoso>
!ops
<ruby[bot]>
dminuoso: ops currently in #ruby: adaedra, Aria, havenwood, Radar, apeiros, baweaver, helpa, jhass, ljarvis, matthewd, miah, ruby[bot], workmad3, zenspider and zzak
<baweaver>
Hrm, maybe not troll, but still uncalled for.
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<baweaver>
dminuoso: ?crosspost
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<baweaver>
?crosspost
<ruby[bot]>
Please do not crosspost without at least telling so and mentioning provided suggestions and their outcome in all channels. Experience shows that people don't do either, and not doing so is considered rude.
<baweaver>
use that next time.
<zotherstupidguy>
how to mate the last occurence of a word in a file? gsub
<zotherstupidguy>
match*
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<baweaver>
How to give more details on what the problem is?
<dminuoso>
baweaver: He kind of did tell, but neglecting to inform other channels that a solution has been found kind of angered me.
<dminuoso>
zotherstupidguy: /\s(\w+)\Z/ ?
* baweaver
shrugs
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<zotherstupidguy>
dminuoso ;)
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<dminuoso>
might be \z though - I cant remember this stuff.
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<baweaver>
rubular.com
<baweaver>
yep, lowercase z
* baweaver
can never remember either
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<dminuoso>
baweaver: I wish it was consistent with beginning of string.
<dminuoso>
Then I could remember.
<baweaver>
It's regex
<baweaver>
that's like asking for Javascript to be sane
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<scootaloo>
Ah, I arrive at the right moment for the troll on other languages.
<scootaloo>
!popcorn
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<scootaloo>
For A-z, it's easy: you start by a capital letter and end with a lowercase letter, like your standard sentence.
<dminuoso>
eggroll: Let me get this straight. This looks at my model, and then emits tests for its validations?
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<eggroll>
dminuoso: It should emit tests for more than validations. It won't be turnkey because there are some values it won't be able to determine, but it should generate much more than a test shell and also provide some guidance as to what needs to be added by you.
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<eggroll>
dminuoso: I'll try to put up a page in the repository wiki that shows what the generated tests look like. Can I post a screenshot here, though?
<dminuoso>
eggroll: Let me be frank. I don't see the scope of it, but if it does mostly what I think it does, it's a fruitless excercise. It's the job of rails to test whether a validation does what it does. Tests should test behavior, not whether a validation really does what rails says it does.
<dminuoso>
eggroll: Sure.
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<dminuoso>
eggroll: Everything there seems to be an anti-pattern - the only effect of which is that it will dramatically decrease test suite performance, with no added value whatsoever.
<dminuoso>
Other than feeling "good" about having a large number of tests that.. "do things"
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<eggroll>
dminuoso: I think I get what you are saying. But what is the point of Shoulda Matchers then?
<dminuoso>
eggroll: allow_value for example can make sense if you have complex validations, but you have some acceptance criteria on what it must (or must not) allow for input.
<dminuoso>
eggroll: but most shoulda matchers are kind of worthless
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<dminuoso>
eggroll: They try to enforce the meaning of a validation, but by writing "validates foo, presence: true" you already enforce the semantic of it. Whether this does what you want it do is rails job, not yours.
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<dminuoso>
eggroll: or let me rephrase, not most - but some of them are.
<dminuoso>
eggroll: Just think about it. You have a model that "validates :foo, uniqueness: true" - now you add a test that asserts that your model validates uniqueness - what exact value have you gained?
<dminuoso>
eggroll: Please think about it and respond to that question with your honest opinion.
<ecnalyr>
How can I gsub the content between two html tags? I'm trying this, but it erases the tags as well: '<secret>stuff</secret>'.gsub(/<secret>.*<\/secret>/, '[FILTERED]') == '[FILTERED]'
<eggroll>
dminuoso: You're testing what is essentially already a test
<dminuoso>
eggroll: And the added value of this test in your testsuite?
<eggroll>
dminuoso: I'm guessing nil or worse
<dminuoso>
eggroll: Don't guess.
<dminuoso>
eggroll: Think about it until you can answer this question. :)
<dminuoso>
Maybe there is a value that I don't see.
<eggroll>
dminuoso: Slower test suite.
<dminuoso>
eggroll: We have established that, but what positive value does it { is_expected.to validate_uniqueness_of(:name) } yield?
<dminuoso>
eggroll: What kind of errors are you hoping to catch?
<eggroll>
dminuoso: It might help to know what this stems from in order to understand why it is what it is and why it may not be as useful as I hoped.
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<dminuoso>
eggroll: Don't get me wrong. I'm not trying to prove your library useless. I'm trying to get you to argue what value it adds.
<dminuoso>
If you can present an argument that it adds value - then great! Keep up the work.
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<dminuoso>
eggroll: Generally you test the behavior of interfaces so that if you make changes to the implementation you don't break anything.
<dminuoso>
eggroll: But there's no interface/implementation behind validates :foo, uniqueness: true to manipulate in an application, so testing it will reveal nothing.
<dminuoso>
That's my perspective.
<eggroll>
dminuoso: I completed prototyping a barebones SAAS application. I'm only two years in with RoR. So, the progression was learning, trial and error, etc. No TDD. I reach a point where I need to have tests, learn testing. I wondering how much can I automate. Discover the regressor gem and feel that is what I'm looking for, just updated. Thought by putting my time into it I could avoid more repetition in the future. But
<eggroll>
you're right, if they are not adding value they are clutter. I think the issue is that I'm learning to determine what is valuable.
<eggroll>
dminuoso: Your perrspective is incredibly helpful!
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<eggroll>
dminuoso: Btw, I wasn't looking at the regressor gem to be a magic wand that generates all my tests. Just an attempt to automate what was automatable. I know there is still tons of functionality within my SAAS that needs to be tested that aren't if touched by this gem.
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<dminuoso>
eggroll: From my experience tests just can't be auto generated. You can probably generate some boiler plate, related code for setup/teardown, perhaps factory stuff.
<dminuoso>
But actual tests are always hand-written - otherwise I don't see how they could possibly add value.
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<dminuoso>
eggroll: Fair enough.
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<Slown>
good bye
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<eggroll>
dminuoso: I thought there might be value in being able to generate more than just a shell, but it seems like it would only provide a false sense of security for the naive. Are there any of the matchers that it does create tests for that you could see having potential value.
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<dminuoso>
eggroll: Anything where you have behavior specified through code.
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<dminuoso>
eggroll: For example a custom validation using a lambda - that is something worth testing
<dminuoso>
That lambda at least.
<dminuoso>
(Though its probably less work if you test the validation in its entirety)
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<eggroll>
dminuoso: And it seems, as you said, difficult to automate. Isn't parsing a lambda difficult, if parsing is the right verb here?
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<dminuoso>
eggroll: Right because the lambda may have some code that describes when a record is valid.
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<eggroll>
dminuoso: I really appreciate you taking the time. As I write the tests for my SAAS, my understanding of were the value in testing lies will evolve and I'll get a better sense of to what extent this gem could, in turn, provide value, if any.
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<dminuoso>
eggroll: let's say you have: validates :foo, uniqueness: true, if: ->(r) { r.number % 2 == 0 } ## now you have explicit behavior that you can test both ways against.
<dminuoso>
eggroll: What such a tool might do, is generate stub tests for anything that seems to have an interface or behavior. (Ignoring how difficult the determination of this may be)
<dminuoso>
That you then implement.
<dminuoso>
Kind of like what rails generators do anyway.
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<eggroll>
dminuoso: Are you saying it's explicit behavior because it is dependent upon what the value of r.number is, which could vary?
<dminuoso>
eggroll: it's dependent on *code*
<dminuoso>
code that rails has not tested before.
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<dminuoso>
the predicate -> (r) { r.number % 2 == 0 } has some meaning. Maybe you have lottery tickets, and you want to ensure that a ticket with an even number *must* be unique for some reason.
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<dminuoso>
now perhaps at some point you modify this code and replace it with r.number.even?
<dminuoso>
or maybe it gets changed to something else.
<dminuoso>
Now you have a visible interface (the predicate) and an implementation.
<eggroll>
dminuoso: The behavior has changed and you want to test that.
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<eggroll>
dminuoso: Actually, it's not so much the behavior has changed, but the implementation.
<dminuoso>
eggroll: The tests ensure that no matter what you do the expected behavior (two lottery tickets with the same even number must not exist) remains intact.
<eggroll>
dminuoso: Got it.
<dminuoso>
Also I suck at coming up with good examples.
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<eggroll>
dminuoso: So, much of what the gem is doing is creating tests for Rails code which Rails already tests.
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<dminuoso>
eggroll: Exactly.
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<eggroll>
dminuoso: Does it matter that the tests it generates look pretty? :)
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<ys_>
hi
<ys_>
Im in the process of trying to figure out why rbenv-gemset isnt install gems to the right gemset. Can anyone help me understand how Bundler determines where to install gems? Im assuming its a ENV var...
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<ys_>
dminuoso thanks! im looking into it right now. i appreciate it
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<ys_>
ha, i have one parameter returned from bundle config..... BUNDLE_JOBS
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<wrkrcoop>
in POODR it says “an object has a dependency when it knows the name of a message that it intends to send to someone other than self.Gear expects a Wheel instance to respond to diameter” … does that mean I can’t know the method of a class?
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<wrkrcoop>
does that mean i can’t know the method of a class i want to call?
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<dminuoso>
wrkrcoop: That sentence sounds broken
<dminuoso>
wrkrcoop: Did you quote it correctly?
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<wrkrcoop>
dminuoso: pretty much yes
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<wrkrcoop>
maybe it references an example that preceds the sentence but thats what it says
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<wrkrcoop>
in OO, when we say message that refers the arguments right?
<wrkrcoop>
and wht we return?
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<dminuoso>
wrkrcoop: "[...] otherr than self.Gear expects a Wheel[...]" does not seem right
<dminuoso>
wrkrcoop: And no.
<wrkrcoop>
that refers to probably what precedes it
<wrkrcoop>
dminuoso: then what is a message
<dminuoso>
wrkrcoop: obj.message - and this kind of happens in Ruby (this is a result of the heavy smalltalk influence)
<wrkrcoop>
so Person.greet … greet is a method and a message?
<wrkrcoop>
or is the return value of greet the message?
<dminuoso>
wrkrcoop: well view it separately
<dminuoso>
wrkrcoop: the object "obj" receives a message "message" - you can catch this in "method_missing" (ignore the name of this for a moment)
<dminuoso>
you can do whatever you want with this message - various DSLs and metaprogramming techniques use this.
<wrkrcoop>
so the thing you pass the method is the message or is the method the msg?
<dminuoso>
wrkrcoop: However Ruby has another default behavior: it looks if a method with the name of the message exists.
<dminuoso>
asm>> obj.method()
<ruby[bot]>
dminuoso: I have disassembled your code, the result is at https://eval.in/696594
<dminuoso>
wrkrcoop: ^- look at the assembly, and see what ruby actually does to a method call
<dminuoso>
it "sends" a message to an object.
<dminuoso>
and the object somehow responds (usually by either throwing an exception or calling a method)
<dminuoso>
method_missing allows you to clearly distinguish between those two, since you can receive messages and do stuff with them without actually having methods
<wrkrcoop>
im stupid or confused i dont get it
<dminuoso>
wrkrcoop: let me make a clearer example
<ruby[bot]>
dminuoso: I have disassembled your code, the result is at https://eval.in/696595
<dminuoso>
wrkrcoop: now look at the upper disassembly, the instruction 0008 loads "arr" ontop of the stack, and instruction 0012 does a: send message "length"
<dminuoso>
it actually even says "send"
<dminuoso>
err I messed the numbers up
<wrkrcoop>
so the method is the message?
<dminuoso>
0006 loads arr and 0008 sends the message.
<dminuoso>
wrkrcoop: ignore the fact that there is a method.
<dminuoso>
there may not be a method
<wrkrcoop>
makes no sense, a method is a verb, and a message is a noun
<dminuoso>
what you think of a method call is actually sending a message to an object
<wrkrcoop>
oh … interesting
<wrkrcoop>
then who is doing the sending?
<dminuoso>
You.
<wrkrcoop>
*mind blown*
<dminuoso>
wrkrcoop: now ruby also happens to by default try to call a matching method if an object receives a message
<wrkrcoop>
interesting
<dminuoso>
>> class Pony; def method_missing(message); puts "Received message: #{message}; end; end; a = Pony.new; a.hello
<ruby[bot]>
dminuoso: # => /tmp/execpad-49b10462613b/source-49b10462613b:7: syntax error, unexpected end-of-input, expecting ke ...check link for more (https://eval.in/696596)
<dminuoso>
err
<dminuoso>
>> class Pony; def method_missing(message); puts "Received message: #{message}"; end; end; a = Pony.new; a.hello
<ruby[bot]>
dminuoso: # => Received message: hello ...check link for more (https://eval.in/696597)
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<wrkrcoop>
thanks dminuoso
<wrkrcoop>
im going to get bakc to reading POODR i appreciate the help … youve made me smarter
<dminuoso>
wrkrcoop: Now Ruby did not invent this, it inherited this from smalltalk
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<enoch85>
hey guys, I'm looking to extract the content of this output to only the words in it
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<enoch85>
someone in #bash told me to go here
<havenwood>
enoch85: This is a good place to be!
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<dminuoso>
enoch85: Have you tried using bash for it?
<konsolebox>
enoch85: and i meant not only to extract, but also do other stuff
<dminuoso>
I know just the place you could ask in.
<enoch85>
dminuoso, no, I don't know where to start
<dminuoso>
enoch85: #bash is great for helping you out!
<dminuoso>
JSON ain't nothing that a good ol' GNU regex can't solve surely.
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<konsolebox>
lol
<enoch85>
dminuoso, tell greycat that in #bash
<enoch85>
:)
<bougyman>
jannson is for that, no?
<bougyman>
or that other one... jq i think it is?
<bougyman>
some two-character binary that starts with j
<dminuoso>
enoch85: It's easy. All you need is a hand-written recursive descent parser.
<bougyman>
I just use ruby, i'm lazy.
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<enoch85>
dminuoso, to explain a bit more... the old directory contains this: http://hastebin.com/iyiyilonad.hs and as you may notice there are directory names that isn't included in the json file... what I'm trying to do is to exclude all the directory names in the old directory so that I'm left with a list that contains only the directory names that isn't included in shipped.json. The purpose is to do a cp -R of those directory names to a exisitng directory
<havenwood>
enoch85: it depends what you want written to txt. maybe you want?: words.join(' ')
<enoch85>
bougyman, you should link a LMGTFY
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<dminuoso>
enoch85: A recursive descent parser is a style of parser you can use to parse complex stuff with. Compilers for complicated programming languages usually use them. For something like JSON it would be absolute and total overkill, not only for the reason that the solution presented by havenwood can use the builtin Ruby JSON parser, but also because it's basically 2-3 lines of code.
<havenwood>
enoch85: or: words.to_json
<bougyman>
yeah well i'm not a prick like that.
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<bougyman>
(not on Tuesday, anyway)
<enoch85>
bougyman, indeed
<bougyman>
Monday, maybe.
<dminuoso>
enoch85: Just to explain where I was pointing you towards. :-)
<enoch85>
dminuoso, thanks for that :)
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<enoch85>
havenwood, check what I wrote to dminuoso --^ that's what I want to do
<zenspider>
dminuoso: I completely disagree with that assessment of RDP. _most_ compliers of complex languages use LR
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<dminuoso>
zenspider: Compilers with a decent degree of error recovery do.
<enoch85>
and to be able to diff it I need to put it into txt or whatever
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<zenspider>
without a lot of extra work, the set of languages that RDP can parse is vastly smaller than what LR(1) can parse
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<dminuoso>
zenspider: RDP can parse any LL(1) without backtracing, more with backtracing. That's enough to cover most languages I suppose.
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<dminuoso>
zenspider: Im not saying anything wrong here I hope.
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<dminuoso>
zenspider: From what I understood is that it's much easier to write rescursive descent parsers than LR parsers (I implemented some for both, but not enough to really be the best juddge)
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<dminuoso>
And with LR usually requiring some form of parser generator any attempts to do error recovery are greatly hindered already.
<dminuoso>
That's what I learned.
<dminuoso>
I could be completely wrong.
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<zenspider>
RDP _is_ LL(1) (assuming no tricks in the lexer)... but no, it doesn't cover most programming languages (that I know of)... it covers languages in the lisp, pascal, and generally unstructured families. It basically can't parse (real) C/++, ruby, perl, python (maybe?), and many other languages that have any forms of ambiguity.
<zenspider>
oh, and my favorite, APL, which is the only RR language I know of
<dminuoso>
zenspider: C and C++ must be parseable by an RDP, considering that's what the GCC frontend uses.
<dminuoso>
Same goes for clang..
<zenspider>
dminuoso: not last time I looked, no, GCC used yacc
<dminuoso>
zenspider: Everywhere I look yacc parsers are replaced with recursive descent parsers for maintainability and error recovery reasons.
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<zenspider>
holy shit. the C parser in gcc is 18284 lines long... also not sure how they deal with the ambiguity of type declarations and such. LR lent itself well to that.
<zenspider>
huh... I wonder what's changed. I've tried to do an LR to LL flip on ruby a number of times and failed out on the complexity every time
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<dminuoso>
zenspider: Were you the big ANTLR fan? Or was it one of the JRuby devs who sometimes hangs out in here?
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<zenspider>
dminuoso: I used to use antlr a fair amount, but I've pretty much hated it since it went java
<zenspider>
the tooling is slow and terrible now, Terr slowly became a jackass, and their website is befuddling
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