Array.prototype.some shim for non-compliant browsers. Converted from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some.

some.coffee

# make sure we have some
unless Array::some
  Array::some = (fun) -> #, thisp
    "use strict"

    throw new TypeError()  unless this?

    thisp = undefined
    i     = undefined
    t     = Object(this)
    len   = t.length >>> 0

    throw new TypeError()  if typeof fun isnt "function"

    thisp = arguments_[1]
    i     = 0

    while i < len
      return true  if i of t and fun.call(thisp, t[i], i, t)
      i++

    false