12 * @param {Function|String} fn or string
17 module.exports = function(obj, fn){
18 if ('string' == typeof fn) fn = obj[fn];
19 if ('function' != typeof fn) throw new Error('bind() requires a function');
20 var args = [].slice.call(arguments, 2);
22 return fn.apply(obj, args.concat(slice.call(arguments)));