在数组内执行一个函数 [英] Execute a function inside array

问题描述

是否可以从数组的内部执行匿名函数（也在数组内部定义）？

  return [
 //执行？ 
 function（）{
 //逻辑
} 
]; 
  

还是我应该在外部定义它，然后再调用它？

解决方案

从技术上讲，您可以将函数括在括号中并像这样调用它：

  return [
（function（）{return 42;}）（）
]; 
  

与

<$ p $相同p> return [
42
];


但是，为什么要这样做？它只会使代码的可读性降低。最好只拥有一个单独的变量来保存闭包，然后根据需要调用它。

Is it possible to execute an anonymous function (also, defined inside the array) from inside the of the array ?

return [
    //execute?
    function() {
        //logic
    }
];

Or should I define it outside and only then call it?

解决方案

Technically, you can enclose the function in parentheses and invoke it like this:

return [
    (function() { return 42; })()
];

which is the same as

return [
    42
];

However, why would you want to do this? It will only serve to make the code less readable. It would be much better to simply have a separate variable that holds the closure and invoke that as required instead.

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