input2.coffee

$unlink: (object) ->
	if isArray(object)
		$unlink(child) for child in object
	else if typeof object is 'object'
		{ key: $unlink(value) } for key, value of object
	else
		object

output2.js

var $unlink;
var __hasProp = Object.prototype.hasOwnProperty;
$unlink = function $unlink(object) {
  var _a, _b, _c, _d, _e, _f, child, key, unlinked, value;
  if (isArray(object)) {
    _a = []; _b = object;
    for (_c = 0, _d = _b.length; _c < _d; _c++) {
      child = _b[_c];
      _a.push($unlink(child));
    }
    return _a;
  } else if (typeof object === 'object') {
    _e = object;
    _f = {};
    for (key in _e) { if (__hasProp.call(_e, key)) {
      value = _e[key];
      _f[key] = $unlink(value);
    }}
    return _f;
  } else {
    return object;
  }
};