How to use Set In Javascript
In this article, we will pass the array to the Set constructor, and using the size property we can access the length of the array. As we know set stores unique elements and if the size of the set is 1 then it denotes that all the elements in the array are equal.
Example: This example shows the use of set for checking the equality of all the element in the array.
let arr = [1, 1, 1, 1];
function allEqual(arr) {
const res = new Set(arr).size === 1;
return res;
}
console.log(allEqual(arr));
Output
true
How to check all values of an array are equal or not in JavaScript ?
Ensuring all values in an array are equal is a common task in JavaScript, useful for validating data consistency and simplifying conditional checks. This guide provides an overview of efficient methods to determine if an array contains identical elements.
Below are the approaches used to check if all values of an array are equal or not in JavaScript:
Table of Content
- 1. Using Array.every() method
- 2. Using Array.reduce() method
- 3. Using Set
- 4. Using for…of loop
- 5. Using filter() Method