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Feature #7883

open

Add Regex#to_proc

Added by rklemme (Robert Klemme) about 11 years ago. Updated over 6 years ago.

Status:
Open
Target version:
-
[ruby-core:52514]

Description

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 Regexp 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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