[ruby-core:43771] [ruby-trunk - Feature #6150] add Enumerable#grep_v

Issue #6150 has been updated by rosenfeld (Rodrigo Rosenfeld Rosas).


"grep pattern, invert: true" is acceptable to me but "grep pattern, true" is not because the code becomes non readable and you'd have to check the API to understand what "true" means. This has nothing to do with Rails vs Ruby.
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Feature #6150: add Enumerable#grep_v
https://bugs.ruby-lang.org/issues/6150#change-25280

Author: sunaku (Suraj Kurapati)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


Please add a grep_v() method to Enumerable that behaves like the opposite of grep().

For example, if Enumerable#grep() was implemented like this:

module Enumerable
  def grep pattern
    select {|x| pattern =~ x }
  end
end

then Enumerable#grep_v() would be implemented like this (select becomes reject):

module Enumerable
  def grep_v pattern
    reject {|x| pattern =~ x }
  end
end


The method name "grep_v" comes from the "-v" option passed to grep(1).

Thanks for your consideration.


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