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allEqual javascript Code Snippet in 2022

arraybeginner

Last Updated: 26 November 2022

Checks if all elements in an array are equal.

  • 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.
const allEqual = arr => arr.every(val => val === arr[0]);
allEqual([1, 2, 3, 4, 5, 6]); // false allEqual([1, 1, 1, 1]); // true

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