JavaScript: Check whether all elements in a given array are equal or not

JavaScript fundamental (ES6 Syntax): Exercise-56 with Solution

Write a JavaScript program to check whether all elements in a given array are equal or not.

• Use Array.prototype.every() to check if all the elements of the array are the same as the first one.
• Elements in the array are compared using the strict comparison operator, which does not account for NaN self-inequality.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const allEqual = arr => arr.every(val => val === arr[0]);
console.log(allEqual([1, 2, 3, 4, 5, 6]));
console.log(allEqual([12, 12, 12, 12]));

Sample Output:

false
true

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-56-1 by w3resource (@w3resource) on CodePen.

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