splice not removing elements when called in a loop

Question

I am writing a code which takes an input string and an array of markers and removes everything from the markers to the end of the on which it is found. I have a function whi

Answer 1

You need to work backwards through the positions array, because when you splice out some elements of arr, the indexes of everything after those elements change.

function solution(input, markers){
  var positions = identify(input, markers);
  var arr = input.split('');

  for(var i = positions.length-2; i >= 0; i-=2){
    arr.splice(positions[i], positions[i+1] - positions[i]);
    console.log(positions[i+1]);
  }
  return arr.join('');
}