ES6/5比较

Posted 2020-08-09 douglasvegas

ES6
function f (x, y, ...a) {
    return (x + y) * a.length
}
f(1, 2, "hello", true, 7) === 9

ES5
function f (x, y) {
    var a = Array.prototype.slice.call(arguments, 2);
    return (x + y) * a.length;
};
f(1, 2, "hello", true, 7) === 9;