Javascript中的空函数 [英] Empty functions in Javascript

问题描述

如果我有这样的话：

  var blah = function（）{}; 
  

然后在代码中使用blah，JSLint提示说删除空块是什么？

解决方案

我不知道 jsLint 是怎么想的，但如果这是一个问题，你需要一个解决方案，然后你可以做类似以下的事情：

  var blah = function（）{return undefined; }; //或者只是回来; 
  

更新：我认为， Bergi 的猜测是正确的，因为在<$ c的 jslint 网站上$ c>必需块部分：

JSLint期望if，while，do和for语句将被生成使用
块{即括在括号中的语句} .JavaScript允许
an if如下所示：if（condition）statement;该形式是
已知会导致错误许多程序员使用相同代码处理
的项目。这就是为什么JSLint期望使用
块：

  if（condition ）{陈述; } 
  

经验表明此表单更具弹性。

所以，它可能只是检查空块 {} 并使空白函数无效。 / p>

If I have something like this:

var blah = function() { };

and then later in code blah is being used, what is the JSLint hint that says remove the empty block?

解决方案

I don't know what jsLint thinks but if this is a problem and you need a solution then you can do something like the following:

var blah = function() { return undefined; }; // or just return;

Update : I think, Bergi's guess is right because, on the jslint site in the Required Blocks section :

JSLint expects that if, while, do and for statements will be made with blocks {that is, with statements enclosed in braces}.JavaScript allows an if to be written like this:if (condition) statement;That form is known to contribute to mistakes in projects where many programmers are working on the same code. That is why JSLint expects the use of a block:

if (condition) { statements; }

Experience shows that this form is more resilient.

So, It probably just checks for empty blocks { } and invalidate the blank function.

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