如何重载JavaScript对象的运算符相等 [英] How to overload operator equality for JavaScript objects
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问题描述
我已经用Dojo.declare创建了新对象。如何为对象重载运算符==?
I have created new objects with Dojo.declare. How to overload operator == for objects ?
推荐答案
您不能重载 ==
,但 ==
有一个隐式 .toString()
调用,因此无论 .toString()
返回将使您可以有效地重载 ==
(kinda):
You can't overload ==
, but ==
has an implicit .toString()
call, so whatever .toString()
returns will allow you to effectively overload ==
(kinda):
function foo(){}
foo.prototype.toString = function(){ return 42; }
var x = new foo();
x == 42; // true
关于如何在Dojo中做到这一点,我不使用Dojo,对不起,但要点是,您可以引用创建的任何对象,并像我的示例一样添加 thatObject.prototype.toString
。
As for how to do this in Dojo, I don't use Dojo, sorry, but the gist is that you get a reference to whatever object is creates and add thatObject.prototype.toString
as in my example.
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