Files
  • index.js
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
function mergeSort(array) {
   if (array.length === 1) {
     return array;
   }
   const middle = Math.floor(array.length / 2);
   const left = array.slice(0, middle);
   const right = array.slice(middle);
   return merge(
      mergeSort(left),
      mergeSort(right)
   );
}

function merge(left, right) {
  console.log('left, right', left, right)
  let result = [];
  let leftIndex = 0;
  let rightIndex = 0;

  while (leftIndex < left.length && rightIndex < right.length) {
    if (left[leftIndex] < right[rightIndex]) {
       result.push(left[leftIndex]);
       leftIndex++;
    } else {
       result.push(right[rightIndex]);
       rightIndex++;
    }
  }

  return result.concat(left.slice(leftIndex)).concat(right.slice(rightIndex));
}

mergeSort([9, 2, 3, 1])
node v10.15.2 linux/amd64