featch.rb

# ary = [0, 1, 2, 3]
# ary.shift.foo until ary.empty?
#
# is equal to:
#
# ary = [0, 1, 2, 3]
# ary.featch { |e| e.foo }

class Array

  # naming of 'fetch each' => featch
  def featch
    yield shift until empty?
  end

end