Iterate Through All an Array's Items Using For Loops mine

JavaScript
1

Tell us what’s happening:
plz i help to go about dis code and and an easy explanation of this test

Your code so far


function filteredArray(arr, elem) {
  let newArr = [];
  // change code below this line
for (let i=0; i< arr.length; i++){
   if (arr[i].indexOf(elem)<0){//my code passed but i need simple explanation for dis
     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/71.0.3578.98 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

if (arr[i].indexOf(elem) < 0) means that this elem is not existed in arr[i]
because indexOf retuns -1 when it finds nothing
so now newArr.push(arr[i]) you push here arr[i] that has not elem

3

ok so is code ok to go

4

your code is good ,that’s what they want you to do .