Stuck running tests on No Repeats Please algorithm

JavaScript
1

I ran the code in FCC but it is stuck running the test. I assume its because there is a lot of recursion going on and there are too many calls on the stack.

The test cases all return the right results when i run them in repl.

How can I get past this issue and onto the next challenge? Do I have to refactor my code to a less expensive solution?

var permutations = [];

var duplicateTest = function(perm) {
  const result = perm.filter(function(arr) {
    var duplicateLtrTest = RegExp(/(\w)\1+/);
    return !duplicateLtrTest.test(arr.join(''));
  })
  return result.length;
}

var swap = function (array, pos1, pos2) {
  var temp = array[pos1];
  array[pos1] = array[pos2];
  array[pos2] = temp;
};

function permAlone (str, n) {
  if (typeof str === 'string') {
    str = str.split('');
  }

  n = n || str.length; // set n default to array.length
  if (n === 1) {
    // output(array);
    permutations.push(Array.from(str));
    var duplicateLtrTest = RegExp(/(\w)\1+/);
    if (!duplicateLtrTest.test(str.join(''))) {
      permutations.push(str);
    }
  } else {
    for (var i = 1; i <= n; i += 1) {
      permAlone(str, n - 1);
      
      if (n % 2) {
        var j = 1;
      } else {
        var j = i;
      }
      swap(str, j - 1, n - 1); // -1 to account for javascript zero-indexing
    }
  }

  return duplicateTest(permutations)
};





permAlone('a');
// permAlone(['a', 'a', 'b', 'b']);
// heapsPermute([1, 2, 3], print)
2

I tried your code and it fine worked for me. Possibly you need to clear local storage from a previous version of your code. Just a guess but worth a try.