Question

So basically, I want to have the program return true when an equality test is put with 0 and an empty string (“”). Then, I could use the following without any error:

0 == ""; // true

But I don’t want to match:

0 == null
0 == undefined
"" == null
"" == undefined

I want them all to return false. How is this possible? I don’t think there’s an operator for this, so is there a way I can change their values to make this work somehow?

Answer 1

function Equals(a,b) {

   if(a===b || (a===0 && b === "") || (a==="" && b === 0)) return true;
    return false;

}

You can look at jsfiddle example.