Steamroller function problem

Tell us what’s happening:

The JSON.stringify before (and also after calling the function) returning the answer prints the correct answer. I can’t figure out what’s wrong.

Your code so far


let ans = [];
function steamrollArray(arr) {
  for (let i in arr) {
    if (typeof arr[i] == "object") {
      console.log("steamrolling ", JSON.stringify(arr[i]));
      steamrollArray(arr[i]);
    } else { 
      console.log("pushing", arr[i]);
      ans.push(arr[i]);
      
    }
  }
  console.log(JSON.stringify(ans));
  return ans;
}

steamrollArray([1, [1], [3, [[4]],],]);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller

Your code give the correct answer for this steamrollArray([1, [1], [3, [[4]],],])
What tests are you not passing?

I am not passing any of the tests.