Question from CtCI

Urlify

let test = "Mr John Smith     ";


function urlify(string) {
  let stringArray = string.split(" ");
  let filteredArray = stringArray.filter(x => x != "")
  let newFilteredArray = filteredArray.join(" ").split("")
  for (let x = 0; x < newFilteredArray.length; x++) {
    if (newFilteredArray[x] === " ") {
      newFilteredArray[x] = "%20"
    }
  }
  return newFilteredArray.join("")
}

console.log(urlify(test))