Allows for iteration of multiple enumerables

enumerable_collate.gemspec

Gem::Specification.new do |s|
  s.name        = 'enumerable_collate'
  s.version     = '0.1.0'
  s.platform    = Gem::Platform::RUBY
  s.author      = 'Hugo Peixoto'
  s.email       = 'hugo.peixoto@gmail.com'
  s.summary     = 'Enumerable Collate'
  s.description = 'Allows for iteration of multiple enumerables'

  s.files         = ['enumerable_collate.rb']
  s.require_path  = '.'

  s.add_development_dependency('rspec', ["~> 2.0"])
end

enumerable_collate.rb

module Enumerable
  def collate *other, &block
    ([self] + other).each { |enum| enum.each &block }
  end
end

enumerable_collate_spec.rb

$:.unshift(File.dirname(File.absolute_path(__FILE__)))
require 'enumerable_collate'

describe Enumerable do
  it "can collate no enumerables" do
    ([1,2,3].collate.collect{|i| i}).should eq([[1,2,3]])
  end

  it "can collate one enumerables" do
    ([1,2,3].collate([4,5]).collect{|i| i}).should eq([[1,2,3],[4,5]])
  end

  it "can collate various enumerables" do
    ([1,2,3].collate([4,5],[6,7]).collect{|i| i}).should eq([[1,2,3],[4,5],[6,7]])
  end
end