From: "Eregon (Benoit Daloze)" <redmine@...>
Date: 2012-03-27T17:48:35+09:00
Subject: [ruby-core:43729] [ruby-trunk - Feature #6150] add Enumerable#grep_v


Issue #6150 has been updated by Eregon (Benoit Daloze).


trans (Thomas Sawyer) wrote:
> Can it be an option?
> 
>   grep(pattern, :invert=>true)

Agreed, adding another method seems overkill (not to mention it does not look right) for such change.
----------------------------------------
Feature #6150: add Enumerable#grep_v
https://bugs.ruby-lang.org/issues/6150#change-25233

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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