Answer by Alireza for How do I check if an array includes a value in JavaScript?

OK, you can just optimise your code to get the result!

There are many ways to do this which are cleaner and better, but I just wanted to get your pattern and apply to that using JSON.stringify, just simply do something like this in your case:

function contains(a, obj) {
    for (var i = 0; i < a.length; i++) {
        if (JSON.stringify(a[i]) === JSON.stringify(obj)) {
            return true;
        }
    }
    return false;
}