Sorted? yes? no? how?

Sorted? yes? no? how?Codewars

Approach

1. copying input array and sort as ascending order

2. if process-1 is same with input it's ascending ordered input

3. if process-1 reversed array is same with input it's descending ordered input

4. nither process-2, process-3 it's not ordered input

Solution

JavaScript

const isSortedAndHow = (array) => {
  const sortedArray = array.slice().sort((a, b) => a - b);
  
  if (JSON.stringify(sortedArray) === JSON.stringify(array)) {
    return 'yes, ascending';
  }
  if (JSON.stringify(sortedArray.reverse()) === JSON.stringify(array)) {
    return 'yes, descending';
  }
  
  return 'no';
};