Coffeescript code to shuffle an array of strings in random order

shuffle.coffee

###
# Given an Array of Strings
# This function will shuffle the String inside the array
# Created by: Julio Cesar Fausto
# http://github.com/jcfausto
###

phrases = [
  'phrase1'
  'phrase2'
  'phrase3'
  'phrase4'
]

shuffle: ->
  phrases_count = phrases.lenght

  while phrases_count
    random_index = Math.floor(Math.random() * phrases_count)
    random_phrase = phrases[--phrases_count]
    phrases[phrases_count] = phrases[random_index]
    phrases[random_index] = random_phrase