array differenc javascript

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Nicolás
15 Jun 2020
1let difference = arr1.filter(x => !arr2.includes(x));
2
Chaima
09 Oct 2018
1function diffArray(arr1, arr2) {
2  return arr1
3    .concat(arr2)
4    .filter(item => !arr1.includes(item) || !arr2.includes(item));
5}
Alan
05 Jan 2017
1function arrayDiff (a1, a2) {
2    var a = [], diff = [];
3    for (var i = 0; i < a1.length; i++) {
4        a[a1[i]] = true;
5    }
6    for (var i = 0; i < a2.length; i++) {
7        if (a[a2[i]]) {
8            delete a[a2[i]];
9        } else {
10            a[a2[i]] = true;
11        }
12    }
13    for (var k in a) {
14        diff.push(k);
15    }
16    return diff;
17}
18//usage:
19console.log(arrayDiff(['red', 'white','green'], [ 'red','white', 'blue']));//["green", "blue"]
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