你如何在 JavaScript 中解释这种结构? [英] How do you explain this structure in JavaScript?

问题描述

(function() 
 {
     //codehere
 }
)();

这种语法有什么特别之处?()() 是做什么的；暗示?

What is special about this kind of syntax? What does ()(); imply?

推荐答案

The 创建一个匿名函数，闭包和所有，并且 final () 告诉它自己执行.

The creates an anonymous function, closure and all, and the final () tells it to execute itself.

基本相同:

function name (){...}
name();

所以基本上这段代码没有什么特别之处，它只是创建一个方法并调用它而无需命名的快捷方式".

So basically there is nothing special about this code, it just a 'shortcut' to creating a method and invoking it without having to name it.

这也意味着函数是一次性的，或者是对象的内部函数，当你需要闭包的特性时最有用.

This also implies that the function is a one off, or an internal function on an object, and is most useful when you need to the features of a closure.

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