arguments.callee 实际上就是函数名。// 递归求n的阶乘function factorial(n) { if (n == 1) { return 1 } return arguments.callee(n - 1) * n //arguments.callee 相当于函数名factorial}console.log(factorial(10));length 属性 argu
ES6 标准新增了一种新的函数: Arrow Function(箭头函数)。 x => x *x 上面的箭头相当于: function (x){ return x*x; } 箭头函数相当于匿名函数,并且简化了函数定义。一种像上面的,只包含一个表达式, 连{ ... }和return都省略掉了。还有一种可以包含多条语句,这时候就不能省略{ ... }和return: x...
let foo2 = function(name) { return `我是${name}` } 箭头函数有两种格式,一种像上面的,只包含一个表达式,连{ ... }和return都省略掉了。还有一种可以包含多条语句,这时候就不能省略{ ... }和return: let foo = (name) => { if(name){ return `我是${name}` } return '前端南玖' } foo...
这篇文章主要是理解ArrowFunction和GeneratorFunction,当然还包括最基本最普通的Function Definitions。 Function 在了解Function Definitions之前我们需要知道函数对象(Function Object)。我们都知道Function本质上也是一个对象,所以普通对象有的方法Function对象都有,此外Function对象还有自己的内部方法。所有Function对象都有一个[[...
In short, with arrow functions there are no binding ofthis. 简而言之,使用箭头函数就不需要绑定它。 In regular functions thethiskeyword represented the object that called the function, which could be the window, the document, a button or whatever. ...
With an arrow function this represents the owner of the function: // Arrow Function:hello = () => { document.getElementById("demo").innerHTML += this;}// The window object calls the function: window.addEventListener("load", hello);// A button object calls the function:document.getElemen...
// Traditional Function function (a){ return a + 100; } // Arrow Function Break Down // 1. Remove the word "function" and place arrow between the argument and opening body bracket (a) => { return a + 100; } // 2. Remove the body brackets and word "return" -- the return is...
Using a regular function: // regular functionletmultiply =function(x, y){returnx * y; }; Using an arrow function: // arrow functionletmultiply =(x, y) =>x * y; Here, both the regular function expression and the arrow function perform the multiplication of two numbers. ...
我们通过使用Object.create(Animal.prototype)创建一个新对象,并将其赋值给Dog.prototype,从而建立原型链。这样就将Dog实例的原型链接到Animal.prototype,实现了继承。 我们在Dog.prototype上添加了一个bark方法,这个方法是特定于由Dog构造函数创建的实例的。
Arrow functions don't have their own arguments object, but in most cases rest parameters are a good alternative: function foo() { var f = (...args) => args[0]; return f(2); } foo(1); // 2 Arrow functions used as methods As stated, arrow function expressions are best suited for...