cleaned up

javascript/1209-Remove-All-Adjacent-Duplicates-in-String-II.js

@@ -4,22 +4,19 @@
  * @return {string}
  */
 var removeDuplicates = function (s, k) {
- const stack = [];
+ const stack = []; // [char, count];
 
  for (const c of s) {
- // Construct stack
  if (stack.length !== 0 && stack[stack.length - 1][0] === c) {
  stack[stack.length - 1][1]++;
  } else {
  stack.push([c, 1]);
  }
 
- // Remove from stack
  if (stack[stack.length - 1][1] === k) {
  stack.pop();
  }
  }
 
- // Build output of remaining characters
  return stack.reduce((res, el) => (res += el[0].repeat(el[1])), '');
 };