ES6 brought significant changes to the JavaScript language. It introduces several new features such as, block-scoped variables, new loop for iterating over arrays and objects, template literals, and many other enhancements to make JavaScript programming easier and more fun. In this chapter, we ...
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let x = new Array(3); // [undefined, undefined, undefined] let y = Array.of(8); // [8] let z = [1, 2, 3]; // Array literal 最后,Array的prototype中添加了几个方法,其中的find方法我觉得Javascript开发者将会非常喜欢。 1、find方法:获取回调函数return true的第一个元素。 2、findIndex...
1、箭头函数 eg: (a, b) => a * b 等价于 function (a, b) { return a * b } 具体箭头函数讲解, 请看:http://www.javascriptkit.com/javatutors/javascriptarrowfunctions.shtml
You’ve probably heard about ECMAScript 6 (or ES6) already. It’s the next version of JavaScript, and it has some great new features. The features have varying degrees of complexity and are useful in both simple scripts and complex applications.
JavaScript ES6 brings new syntax and new awesome features to make your code more modern and more readable. It allows you to write less code and do more. ES6 int...
This operator, combined with the new Array.findIndex method, allows searching by predicate with the following well-looking, succinct code.JavaScript نسخ const players = [...]; // Suppose this is an array of Player Profiles // Search by predicate: find item in 'players' that has...
从ES6重新认识JavaScript设计模式(五): 代理模式和Proxy 1 什么是代理模式 为其他对象提供一种代理以控制对这个对象的访问。在某些情况下,一个对象不适合或者不能直接引用另一个对象,而代理对象可以在客户端和目标对象之间起到中介的作用。 在生活中,代理模式的场景是十分常见的,例如我们现在如果有租房、买房的需求,...
This essay will give you a quick introduction to ES6. If you don’t know what is ES6, it’s a new JavaScript implementation. If you’re a busy JavaScript software engineer (and who is not?), then proceed reading to learn the best 10 features of the new generation of the most popular...
var 是 JavaScript 中基础的变量声明方式之一,其基本语法为: var x; // Declaration and initialization x = "Hello World"; // Assignment // Or all in one var y = "Hello World"; ECMAScript 6 以前我们在 JavaScript 中并没有其他的变量声明方式,以var声明的变量作用于函数作用域中,如果没有相应的闭...