check if 2 arrays are equal javascript
const a = [1, 2, 3];
const b = [4, 5, 6];
const c = [1, 2, 3];
function arrayEquals(a, b) {
return Array.isArray(a) &&
Array.isArray(b) &&
a.length === b.length &&
a.every((val, index) => val === b[index]);
}
arrayEquals(a, b); // false
arrayEquals(a, c); // truewhen are 2 arrays same value in javascript
// the answer when the index is not important
function arrSimilar(arr1, arr2) {
// first lets check if the length is the same
if (arr1.length !== arr2.length) {return false}
let notSimilarItemsCounter = 0
arr1.map((item) => {
!arr2.includes(item) ? notSimilarItemsCounter++ : true ;
})
if ( notSimilarItemsCounter ) {
return false
}else {return true}
}
//byQolamcompare two arrays and make sure there are no duplicates js
array1 = array1.filter(val => !array2.includes(val));Copyright © 2021 Codeinu
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