funcs.js

function delayed (fn, args) {
  var _this = this, _args = args || arguments;
  setTimeout(function () {
    fn.apply(_this, _args);
  }, 0);
}

function once (fn, nextValue) {
  var result, hasNextValue = arguments.length > 1;
  return function () {
    if( fn ) {
      result = fn.apply(this, arguments);
      fn = null;
      return result;
    }
    return hasNextValue ? nextValue : result;
  };
}