Iterate Through All an Array's Items Using For Loops -- help

JavaScript
1

Tell us what’s happening:

What wrong am I doing here?

Your code so far


function filteredArray(arr, elem) {
  let newArr = [];
  // change code below this line
for (let i = 0; i < arr.length; i++){
  for (let j = 0; j < arr[i].length; j++){
    if(arr[i][j].indexOf(elem) === -1){
      newArr.push(arr[i]);
    }
  }
}
  // change code above this line
  return newArr;
}

// change code here to test different cases:
console.log(filteredArray([[3, 2, 3], [1, 6, 3], [3, 13, 26], [19, 3, 9]], 3));

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops/

2

arr[i][j] is just a number, so it doesn’t have the indexOf method. Maybe you meant arr[i]

That still won’t fix everything though. Try a bunch of inputs and see the results in the console.

1 Like
4

I got it, I was iterating it another time unnecessarily.