#
class Array

  # As with #select but modifies the Array in place.
  #
  #   a = [1,2,3,4,5,6,7,8,9,10]
  #   a.select!{ |e| e % 2 == 0 }
  #   a  #=> [2,4,6,8,10]

  def select!  # :yield:
    reject!{ |e| not yield(e) }
  end

end



#  _____         _
# |_   _|__  ___| |_
#   | |/ _ \/ __| __|
#   | |  __/\__ \ |_
#   |_|\___||___/\__|
#
=begin test

  require 'test/unit'
  require 'set'

  class TestArray < Test::Unit::TestCase

    def test_select!
      a = [1,2,3,4,5,6,7,8,9,10]
      a.select!{ |e| e % 2 == 0 }
      assert_equal( [2,4,6,8,10], a)
    end

  end

=end