Ruby-Like select for Array

gistfile1.coffee

Array::select = (requestedElement) ->
  count = {}
  array = []
  for element in this
    count[element] = (count[element] || 0) + 1
  if count[requestedElement]
    for i in [1..count[requestedElement]]
      array.push(requestedElement)
    return array
  else
    return null

Note: Doesn't work for requesting an element's property in an array.