Find array elements that are out of order in JavaScript

Question

Find array elements that are out of order in JavaScript

JavascriptWeb DevelopmentObject Oriented ProgrammingFront End Technology

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Suppose we have an array of sorted numbers but some elements of the array are out of their sorted order.

We are required to write a JavaScript function that takes in one such array and returns a subarray of all those elements that are out of order.

Example

The code for this will be −

const arr = ["2", "3", "7", "4", "5", "6", "1"];
const findOutOfOrder = arr => {
   let notInOrder = [];
   notInOrder = arr.filter((el, ind) => {
      return ind && this.next !== +el || (this.next = +el + 1, false);
   }, {
      next: null
   });
   return notInOrder;
};
console.log(findOutOfOrder(arr));

Output

The output in the console −

[ '7', '1' ]

AmitDiwan

Published on 10-Oct-2020 11:17:41

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