JavaScript - Check if array is sorted (irrespective of the order of sorting)

We are required to write a JavaScript function that takes in an array of literals and checks if the array is sorted or not (irrespective of the order of sorting.)

Our function should return true if the array is sorted, false otherwise. Following is the code −

Example

const arr = [1, 3, 56, 87, 99, 102, 144, 255, 456, 788, 999];
const isSorted = arr => {
   const { length: l } = arr;
   if(l <= 1){
      return true;
   };
   for(let i = 1; i < l; i++){
      const con1 = arr[i] > 0 && arr[i-1] < 0;
      const con2 = arr[i] < 0 && arr[i-1] > 0;
      if(con1 || con2){
         return false;
      };
   };
   return true;
};
console.log(isSorted(arr));

Output

Following is the output in the console −

true

AmitDiwan

Updated on 15-Sep-2020 11:45:15

• Related Questions & Answers
• Identify all duplicates irrespective of the order of the input
• MongoDB query for documents matching array, irrespective of elements order
• Large to Small Sorting Algorithm of already sorted array in JavaScript
• Check if a string is sorted in JavaScript
• Check if an array is descending, ascending or not sorted in JavaScript
• Sorting digits of all the number of array - JavaScript
• Sorting one string by the order of second in JavaScript
• Sorting an associative array in ascending order - JavaScript
• Check if an array is sorted and rotated in Python
• Check if an array is sorted and rotated in C++
• Uneven sorting of array in JavaScript
• Check if reversing a sub array make the array sorted in Python
• Sorting an array of binary values - JavaScript
• Sorting parts of array separately in JavaScript
• Alternative sorting of an array in JavaScript