From: Artem Voroztsov <artem.voroztsov@...>
Date: 2008-03-13T20:19:14+09:00
Subject: Enumerator in ruby 1.9.

# One could write
module Enumerable
  def sum
    inject(0) {|f,x| f+x}
  end
end

# And we have
puts [1,2,3,4].sum # => 10

# But it works only for numbers.
# I would like to write more general code:

module Enumerable
  def sum
    each.skip_first.inject(first) {|f,x| f+x}
  end
end

# so we have:
puts [1,2,3,4].sum #=> 10
puts ['a','b','c'].sum #=> 'abc'
------------------------

1) Is it a good idea to add method ''first' to  Enumerable?
2) Please, show me the _right_ code for Enumerator#skip_first(n=1) (ruby1.9)

Thanks!