我如何比较 javascript 中的 2 个函数 [英] how do I compare 2 functions in javascript

问题描述

如何比较 javascript 中的 2 个函数?我不是在谈论内部参考.说

How do I compare 2 functions in javascript? I am not talking about internal reference. Say

var a = function(){return 1;};
var b = function(){return 1;};

是否可以比较 a 和 b ?

Is it possible to compare a and b ?

推荐答案

var a = b = function( c ){ return c; };
//here, you can use a === b because they're pointing to the same memory and they're the same type

var a = function( c ){ return c; },
    b = function( c ){ return c; };
//here you can use that byte-saver Andy E used (which is implicitly converting the function to it's body's text as a String),

''+a == ''+b.

//this is the gist of what is happening behind the scences:

a.toString( ) == b.toString( )  

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