Example task solution for WIX Junior Frontend Engineer - Kickstart

wix-task-example.js

const solution = (str, num) => {
  if (num < 1 || num > 500) return 'Characters length is out of the range'

  const wordsArr = str.split(' ')
  const wordsLengthArr = wordsArr.map(word => word.length)

  let resultArr = []
  let temp = ''

  wordsArr.forEach((word, index) => {
    if (index === 0 && word.length <= num) temp = word
    else if (temp.length + word.length + 1 <= num) temp = (`${temp} ${word}`).trim()

    if (temp.length + wordsLengthArr[index + 1] + 1 > num) {
      resultArr.push(temp)
      temp = ''
    }
  })

  resultArr.push(temp.trim())
  // console.log(resultArr.length)
  return resultArr.length
}

const s = 'SMS messages are really short'
const k = 12

solution(s, k)