#ruby on 2019-11-18 — irc logs at freenode.irclog.whitequark.org

2019-10-22 15:51 havenwood changed the topic of #ruby to: Rules & more: https://ruby-community.com | Ruby 2.6.5, 2.5.7, 2.7.0-preview2: https://www.ruby-lang.org | Paste 4+ lines of text to https://dpaste.de/ and select Ruby as the language | Rails questions? Ask in #RubyOnRails | Books: https://goo.gl/wpGhoQ | Logs: https://irclog.whitequark.org/ruby | Can't talk? Register/identify with Nickserv first!

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00:25 <goepsilongo> Hi!

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00:58 <al2o3-cr> goepsilongo: o/

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01:52 <walley> any one here help with OO Tic Tac Toe

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01:55 <walley> :b (y)

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02:14 <Iambchop> walley: if you have a specific question about some code, paste it into dpaste or gist and ask away :)

02:14 <walley> Thanks

02:15 <walley> gist please can i have the site

02:19 <walley> got that

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02:45 <Milos> I'm trying to (using metaprogramming) create a nested block in a block in a block in a block in a ... etc. How can this be done? I am basically trying to create this https://puu.sh/EFOzb/ce737f3995.png but dynamically. If I specify a list of models, I want it to run "transaction" inside it, and keep nesting it, but without writing out all the models.

02:46 <Milos> I am guessing I need to somehow change the context of the block, maybe something using instance_eval? I am not sure.

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03:08 <Milos> I got what I want using something like this: https://bpaste.net/show/7QCXC

03:14 <walley> Thanks

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11:35 <Bish> i have this line in my code: when Date, DateTime, Time then v.iso8601

11:36 <Bish> would it be possible to check if a object responds to a method name in a when clause?

11:36 <Bish> (case when something.respond_to?(:sym) …) sure works

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13:59 <crella133> https://dpaste.de/r5hq Can I declare a function without defining it like C lang? Running this ruby code would throw an error about :: undefined method 'f'. But I really like to achieve the function on some occasions.

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14:13 <crella133> I have modified my program to temporarily pass round the problem, but I still hope for a solution :)

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14:22 <leitz> crella133, have you tried that in irb?

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14:23 <leitz> You can define an empty method, but there's an argument count mismatch, I think, if you don't deal with any args. Make them optional, maybe?

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16:16 <cjohnson> For 2.7 pattern matching, what happens for multiple potential matches against a pattern? Is the element returned just the first matching element?

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16:21 <havenwood> Matz is giving his RubyConf keynote: https://youtu.be/oGNR63RQ6AM

16:22 <havenwood> cjohnson: Show an example of what multiple matches would look like?

16:23 <ytti_> i assume if it is allowed to be ambiguous then first match

16:23 <ytti_> but seems like implementation detail

16:23 <havenwood> I'm trying to think of what an ambiguous match would look like?

16:24 <cjohnson> case obj \n in {name: "Bob"} \n p age \n in _ \n p "no match" \n end

16:24 <cjohnson> Er I guess that'd be arr_of_objs

16:24 <cjohnson> Nevermind I got the example wrong. Let me just make a gist

16:25 <cjohnson> https://gist.github.com/chrisjohnson/f1310663ab0499e8cad37f5e2c0d688a

16:26 <cjohnson> Is the `children` match here a 100% match of the array? Maybe that's the answer

16:26 <ytti_> oh, i' stayed in jw marriott in nashville

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16:26 <ytti_> i'm always bit surprised how large even 'small' cities in US are

16:27 <ytti_> nice venue

16:28 <cjohnson> nashville is not a small city hah

16:28 <cjohnson> where you from ytti_ ?

16:29 <ytti_> i'm currently based in limassol

16:30 <cjohnson> ha

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16:34 <ytti_> there are some compelling advantages, particularly as part of retirement plan

16:35 <ytti_> not available to US citizens or people holding green card in excess of 8 years tho

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16:36 <havenwood> cjohnson: With the following, `x #=> "Alice"` and `y #=> "Bob"`: {name: "Alice", children: [{name: "Bob", age: age}]} in {name: x, children: [{name: y}]}

16:36 <havenwood> {name: "Alice", children: [{name: "Bob", age: age}]} in {name: x}; x #=> "Alice"

16:37 <havenwood> cjohnson: It doesn't recurse or anything like that.

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16:38 <havenwood> It'll only try to match the key in the top Hash with a top Hash matcher. No iteration or recursion to nested values.

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17:02 <cjohnson> I see

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19:47 <causasui> trying to uninstall a gem I get NameError for "uninitialized constant Gem::RDoc". I just want this thing gone. Nuking all the gems is acceptable since I installed gem just to try this thing out. help?

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19:49 <jhass> try adding --no-rdoc to the install comamnd

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19:50 <jhass> or -N actually

19:50 <havenwood> --no-document

19:50 <causasui> invalid option for both of those

19:50 <causasui> wait

19:50 <causasui> why install? I already installed it

19:50 <causasui> I want to uninstall

19:51 <jhass> oh, overread that sorry

19:52 <jhass> https://stackoverflow.com/a/58798613/2199687

19:52 <havenwood> causasui: RDoc is a default gem, so it should be there. https://stdgems.org/

19:52 <causasui> alright gem install rdoc did it

19:53 <jhass> let me guess, debian? :D

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19:55 <havenwood> ruby-full for a fuller ruby

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20:08 <NL3limin4t0r> I'm not sure when RDoc was declared a stdlib gem, but at least we know jhass runs a version before that happend.

20:09 <jhass> I do?

20:09 <jhass> no debian anywhere <3

20:10 <NL3limin4t0r> srry I mean, causasui

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20:13 <havenwood> NL3limin4t0r: Debian split Ruby up into modular packages, which tends to confuse folk who don't know to: apt-get install ruby-full

20:13 <NL3limin4t0r> ah, that explains things

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22:47 <miah> dont worry, your next problem will likely be that its a ancient version of ruby ;)

22:50 <phaul> wfiw on arch I also experienced some weirdness in the past when you do yay -S ruby ; gem install rails; and then rails c runs into irb not being installed.

22:51 <phaul> not sure how or when we lost irb being part of core ruby

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23:26 <miah> i still use chruby on arch

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23:58 <al2o3-cr> phaul: irb is a separate package on Arch - ruby-irb