JavaScript Quiz Question Help

Question

var a={value:20}
var b={value:20}
alert(a==b)

why is this false??? a and b are equal, aren’t they?

Answer 1

That's because in JavaScript, objects are compared by reference. That means JavaScript looks if both objects are pointing to the same memory.
They are unlike strings or numbers that are compared by value in equality operations.

var a = {value:20};
var b = {value:20};
alert(a == b); // false

var c = b;
alert(c == b); //true

Answer 2

Hi RexMayhem

Just to add to Jonathan's answer if you want to compare the contents of an Object you can use

Node.js deep compare lib
https://www.npmjs.com/package/deep-equal

or convert object to string using JSON stringify

JSON.stringify(a) === JSON.stringify(b);

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify

Answer 3

Thanks for your answers! That helps. I’ll just post another reference for beginners like myself to review some elementary JS: https://www.w3schools.com/js/js_objects.asp