To try to pick up on CoffeeScript, i wrote a few quick functions to mimic Ruby's Array operations

Ruby array operations in CoffeeScript

Array::collect = (action) -> 
  for item in this
    action(item)

Array::map = (action) -> this.collect(action)

Array::inject = (initial, action) ->
  for item in this
    initial = action(initial, item)
  initial 

Array::compact = ->
  new_arr = []
  (new_arr.push item if item?) for item in this
  new_arr