flatten.coffee

assert = require 'assert'

module.exports = fn = (data) ->
  return [data] unless data instanceof Array

  a = []
  a = a.concat(fn(elem)) for elem in data
  a
    

assert.deepEqual(fn( 3                                    ), [3]                             )
assert.deepEqual(fn( { a: 1, b: "hi", c: /xyz/ }          ), [ { a: 1, b: "hi", c: /xyz/ } ] )
assert.deepEqual(fn( [ 1, 2, 5 ]                          ), [ 1, 2, 5 ]                     )
assert.deepEqual(fn( [ 1, [[[[[ 2 ]]]]], [[[[ 5 ]]]] ]    ), [ 1, 2, 5 ]                     )
assert.deepEqual(fn( [ [ 1, [ [ [ 2, 3 ], 4, 5 ], 6 ] ] ] ), [ 1, 2, 3, 4, 5, 6 ]            )
assert.deepEqual(fn( [ undefined, [ null ] ]              ), [ undefined, null ]             )