#ruby on 2021-12-08 — irc logs at libera.irclog.whitequark.org

2021-11-24 14:34 adam12 changed the topic of #ruby to: Rules: https://ruby-community.com | Ruby 3.0.3, 2.7.5, 2.6.9: https://www.ruby-lang.org | Paste 4+ lines to: https://gist.github.com | Books: https://goo.gl/wpGhoQ

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01:07 <axisys> what is recommended way to install ruby on macos? or should that be a question for #macos?

01:07 <axisys> or #macosx rather

01:26 <nakilon> axisys install homebrew, then "brew install rbenv"

01:27 <nakilon> then "rbenv install -l" to list the most fresh versions for "rbenv install <version>"

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01:28 <nakilon> then rbenv shell/local/global to activate the version you like

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02:44 <havenwood> axisys: chruby, asdf, rbenv, and RVM are all fine options for version switching

02:45 <havenwood> axisys: assuming you'll need multiple versions of Ruby at once, varied by project?

02:46 <havenwood> if you just want the latest modern stable Ruby and don't need to install specific versions you can also just install Ruby through Brew

02:46 <havenwood> usually devs need multiple versions, so version switches come into play

02:48 <havenwood> https://gist.github.com/havenwood/ba31f67c1d89ac236400

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02:51 <ox1eef> discovered $SAFE is no more today.

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16:49 <nakilon> I wonder what does "Ruhy - OS" mean here https://3.bp.blogspot.com/-xhOP35Dm99w/UuXFKgY2dlI/AAAAAAAAAGA/YQu98_pPDjw/s1600/reichart-abstraction-diagram.png

16:54 <leftylink> and why not the other languages in OS?

16:54 <leftylink> hmmmmmmm

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16:58 <leftylink> ah too bad, what a bad bug I had

16:58 <leftylink> to check whether Array.new(5) { rand(1..5) } contains both 3 and 5. you cannot say `r & [3, 5] == [3, 5]`

17:09 <leftylink> pandabot: rb 100.times { r = (1..5).to_a.sample(3); raise "WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG" if (r & [3, 5] == [3, 5]) != (r.include?(3) && r.include?(5)) }

17:09 <pandabot> stderr: -e:2:in `block in <main>': WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG (RuntimeError) - exit 1 - https://carc.in/#/r/cf0a

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17:38 <havenwood> leftylink: for Sets there are good ways

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17:38 <havenwood> pandabot: rb Array.new(5) { rand(1..5) }.then { |numbers| [3, 5].all? { numbers.include?(_1) } }

17:39 <havenwood> leftylink: combining #all? and #include? is the standard way

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17:45 <havenwood> Set[3, 5].subset? Set.new([*1..10].sample(4))

17:45 <havenwood> or you can write it

17:45 <havenwood> Set.new([*1..10].sample(4)) > Set[3, 5]

17:46 <havenwood> I look forward to the Set literal.

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19:57 <leftylink> set literals would be cool

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22:14 <nakilon> I just sort

22:15 <nakilon> yet didn't have any case of a bottleneck here

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