From: shortcutter@...
Date: 2014-12-23T00:01:49+00:00
Subject: [ruby-core:67047] [ruby-trunk - Feature #7883] Add Regex#to_proc

Issue #7883 has been updated by Robert Klemme.


Was any of the two suggested forms ever realized?

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Feature #7883: Add Regex#to_proc
https://bugs.ruby-lang.org/issues/7883#change-50567

* Author: Robert Klemme
* Status: Open
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: core
* Target version: next minor
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Just a small addition to the standard library:

class Regexp
  def to_proc; lambda {|s| self =~ s} end
end

With that one can use a Regex everywhere a Proc is used as filtering criteria saving a bit of typing.  While we have Enumerable#grep already there may be other cases where you want to do something like

irb(main):008:0> %w{foo bar baz}.select &/\Ab/
=> ["bar", "baz"]
irb(main):009:0> %w{foo bar baz}.reject &/\Ab/
=> ["foo"]
irb(main):010:0> %w{foo bar baz}.find &/\Ab/
=> "bar"

Note: line 9 and 10 are not possible with Enumerable#grep AFAIK.

I see low risk of breaking something.



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