var t = function () { var x = arguments.length <= 0 ? undefined : arguments[0]; var y = arguments.length <= 1 ? undefined : arguments[1]; }; function t() { var x = arguments.length <= 0 ? undefined : arguments[0]; var y = arguments.length <= 1 ? undefined : arguments[1]; } function t() { var a = []; for (var i = 0; i < arguments.length; i++) { a.push(i); } return a; } // https://github.com/babel/babel/pull/2833#issuecomment-166039291 function t() { for (var i = 0; i < arguments.length; i++) { return i < 0 || arguments.length <= i ? undefined : arguments[i]; } }