Ruby: autocomplete in irb and colorize with wirble and set as default

$ sudo gem install wirble
...

irb(main):002:0> require 'wirble'
irb(main):003:0>
irb(main):004:0> Wirble.init
irb(main):005:0> Wirble.colorize
irb(main):006:0>
irb(main):008:0> h = {:foo => "foo"}
=> {:foo=>"foo"}

irb(main):017:0> h.each
h.each          h.each_pair    h.each_with_index
h.each_cons     h.each_slice   h.each_with_object
h.each_key      h.each_value

To set Wirble as default for irb

~/.irbrc

require 'rubygems'
require 'wirble'
Wirble.init(:skip_prompt => :DEFAULT)
Wirble.colorize