check if arrays are equal javascript code example

Example 1: 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); // true

Example 2: check array values equal js

[1,1,1,1].every( (val, i, arr) => val === arr[0] )   // true

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