check if object is present in array javascript

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Sofia
02 Aug 2020
1var obj = {a: 5};
2var array = [obj, "string", 5]; // Must be same object
3array.indexOf(obj) !== -1 // True
Christian
24 May 2017
1//Use something like this:
2
3function containsObject(obj, list) {
4    var i;
5    for (i = 0; i < list.length; i++) {
6        if (list[i] === obj) {
7            return true;
8        }
9    }
10
11    return false;
12}
13
14//In this case, containsObject(car4, carBrands) is true. Remove the carBrands.push(car4); call and it will return false instead. If you later expand to using objects to store these other car objects instead of using arrays, you could use something like this instead:
15
16function containsObject(obj, list) {
17    var x;
18    for (x in list) {
19        if (list.hasOwnProperty(x) && list[x] === obj) {
20            return true;
21        }
22    }
23
24    return false;
25}
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