when are 2 arrays same value in javascript

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Maria
22 Jan 2019
1const a = [1, 2, 3];
2const b = [4, 5, 6];
3const c = [1, 2, 3];
4
5function arrayEquals(a, b) {
6  return Array.isArray(a) &&
7    Array.isArray(b) &&
8    a.length === b.length &&
9    a.every((val, index) => val === b[index]);
10}
11
12arrayEquals(a, b); // false
13arrayEquals(a, c); // true
source
Lison
20 Jun 2018
1// the answer when the index is not important
2function arrSimilar(arr1, arr2) {
3
4    // first lets check if the length is the same
5    if (arr1.length !== arr2.length) {return false} 
6    let notSimilarItemsCounter = 0
7    arr1.map((item) => {
8        !arr2.includes(item) ? notSimilarItemsCounter++ : true ;
9    })
10    if ( notSimilarItemsCounter ) {
11        return false
12    }else {return true}
13}
14
15//byQolam
source
Sofie
20 Jul 2020
1array1 = array1.filter(val => !array2.includes(val));
2
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