Function swap

chapter10/sortingAlgos/quickSort.js:3–8

(array, left, right)

// write the quickSort algorithm

const swap = (array, left, right) => {
  const temp1 = array[left];
  const temp2 = array[right];
  array[left] = temp2;
  array[right] = temp1;
};

const partition = (array, left, right) => {
  const pivotIndex = Math.floor((left + right) / 2);