ES6 push() 数组方法 ES6 pop() 数组方法 ES6 reduce() 数组方法 reduce() ES6 push() 数组方法 var numbers = new Array(1, 4, 9); var length = numbers.push(10); console.log("new numbers is : " + numbers ); length = numbers.push(20); console.log("new numbers is : " + numbers ); ES6 pop() 数组方法 ES6 reduce() 数组方法 reduce()