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<comet23>
i am having trouble writing ruby code... i converted my ruby logic to javascript and it works in javascript :/
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<comet23>
okay i got it nvm sorry for false alarm
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<orbyt_>
In a case/switch statements, can only a single "when" block be executed?
<orbyt_>
or will any and all matching when clauses be run?
<havenwood>
orbyt_: Just one - no fall through.
<orbyt_>
So it runs the first match and then exists the switch?
<orbyt_>
exits*
<orbyt_>
Confirmed with irb, thanks.
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<djdduty>
Hey guys, my Ruby.framework on macOS is missing the universal-darwin18/ruby/config.h and only has universal-darwin17/ruby/config.h, I have made sure I have the most recent version of everything. Anyone else run in to this and know the solution or if I'm asking in the wrong place?
<djdduty>
Seems more like a package management issue than ruby, but figured I'd ask here.
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<havenwood>
djdduty: How are you running into the issue?
<djdduty>
havenwood Attempting to install a gem via a bundle install that is throwing an error about it missing.
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<havenwood>
djdduty: Most folk on macOS opt to install a newer Ruby alongside the system Ruby to use for their own projects.
<djdduty>
havenwood I used rbenv to set 2.5.3 as my global version
<djdduty>
But for whatever reason it's still trying to use 2.3 from the System when installing the bundle
<djdduty>
ruby -v confirms that 2.5.3 is selected.
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<djdduty>
looks like it may be related to macOS sdk headers or something, IIRC when I upgraded to mojave I did it before the full release (it was beta), I wonder if that's it.
<havenwood>
djdduty: Is bundler installed on Ruby 2.5?
<havenwood>
djdduty: What do you get for?: which bundler
<havenwood>
djdduty: gem which bundler
<djdduty>
which bundler does show the 2.3.0 bin
<djdduty>
Didn't think of that.
<havenwood>
djdduty: A `gem install bundler` should do the trick.
<djdduty>
I'll try that, thanks.
<djdduty>
havenwood I did a `gem update --system` and `gem install bundler` which prompted an overwrite of the bundler in the 2.5.3 directory, went ahead
<djdduty>
which bundle/which bundler still shows the 2.3.0 path
<havenwood>
?rbenv djdduty
<ruby[bot]>
djdduty: Missing command under rbenv? Did you try `rbenv rehash`?
<djdduty>
Hold on
<djdduty>
Looks like my .zshrc has something explicitly adding the ~/.gem/ruby/2.3.0 to my path
<djdduty>
I removed that and now which bundler points to ~/.rbenv/shims/bundler
<djdduty>
Hey, that did it.
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<djdduty>
havenwood Thanks a million.
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<havenwood>
djdduty: 👍🏽 np
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<sandelius>
Evening Rubyists
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<comet23>
how do you define a shift operator?
<comet23>
i mean unshift
<comet23>
the >> operator
<comet23>
so it will work like the << operator
<sandelius>
comet23 ruby doesn't have a "shorthand" syntax for that, you need to call arr.unshift
<comet23>
how would you define it though
<sandelius>
or you want to make one?
<comet23>
yeah i want to make one
<comet23>
it's long overdue
<sandelius>
ahh just define a def<<(value) method on array that uses unshift, or alias it
<comet23>
so for me to change array methods i would have to go into the array class
<comet23>
interesting
<sandelius>
live?
<comet23>
thank you :D
<comet23>
live no
<sandelius>
ok, I do not like to "monkey-patch" core classes. I would do something like this: (one sec)
<sandelius>
can you see my changes?
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<comet23>
i can
<comet23>
but why not just change the core class?
<sandelius>
Cause that will change it for all array in your entire program. This used på be popular but then people realized bug-hunting is just not worth it. It's pretty cool tho that we can create "operators" on the fly :)
<sandelius>
It's about "Element of surprise" when the next person is going threw the code
<sandelius>
IMO this is one of RoR biggest flaws
<leftylink>
well that sounds like a time for refinements doesn't it
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<comet23>
what i fail to understand is how could it introduce bugs if the code is bug free to begin with?
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<phaul>
comet23: imagine the chaos if everybody is randomly adding functionality to classes that everybody uses. If two gems are adding the same methods to array differently, and you depend on both, then you are in screwed
<comet23>
i can't imagine what you're saying :/
<comet23>
like to me having the >> operator is intuitive
<phaul>
yeah. and I define it so that my array shifts all of its contents (numbers) by given number of bits. Because in my domain that feels intuitive
<phaul>
point is unless there is an authority to it , it just end up in chaos
<sandelius>
comet23 When the project gets bigger, or many people are working on it, that's when the issues occur. Not not so much about a bug in that method, more about playing detective
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<Haris>
hello all
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<Haris>
is there a way to uninstall all rubies/gems that got installed for some app?
<Haris>
for .e.g, I'm installing redmine
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<woodruffw>
Haris: if you user bundler, you can remove the whole vendor/ subdirectory
<woodruffw>
i don't think there's a clean way to do it if you used `gem` directly
<Haris>
its empty
<woodruffw>
hmm
<Haris>
I did run bundle install for redmine
<Haris>
I don't have mod_passenger for centos 7 that supports ruby 2.2.2 or above
<havenwood>
Haris: Rubies don't usually get installed with an app. How to best uninstall a Ruby depends on how you installed it.
<Haris>
I have to remove bundle installed rubies/gems for redmine 4.x to then be able to install rubies/gems for redmine 3.4.7
<havenwood>
Haris: By default, Bundler installs to $BUNDLE_PATH or $GEM_HOME. Gem you install there are intermingled with your other gems in that location. You can use --path to specify a different directory.
<Haris>
hmm
<havenwood>
Haris: You can uninstall all gems with: gem uninstall --all
<Haris>
do ruby apps run in venv?
<havenwood>
Haris: We prefix commands with `bundle exec` to limit the gems to those specified in the Gemfile.lock.
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<havenwood>
Haris: For deployment, we typically install gems to a /vendor directory locally in the app.
<Haris>
that's the objective. uninstall gems that were installed from gemfile
<Haris>
./vendor is there. but its empty
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<Haris>
looks like its going in system wide, since I'm = root
<havenwood>
Haris: The Bundler default is &GEM_HOME. Folk often use the --deployment flag in prod for a path of ./vendor.