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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Next: Write a JavaScript program to compute the average of an array, after mapping each element to a value using the provided function.
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JavaScript: Tips of the Day
Chunks an array into n smaller arrays
Example:
const tips_chunkIntoN = (arr, n) => { const size = Math.ceil(arr.length / n); return Array.from({ length: n }, (v, i) => arr.slice(i * size, i * size + size) ); } console.log(tips_chunkIntoN([1, 2, 3, 4, 5, 6, 7,8], 4));
Output:
[[1,2],[3,4],[5,6],[7,8]]
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