How to move punctuation from the start or middle of a string to the end

Question

I've got a Pig Latin translator that I've set up to take single or multi-word strings, but it can't do punctuation.

As it is, translatePigLatin("Pig Latin"); returns 'Igpay Atinlay' , as it should, but translatePigLatin("Pig Latin."); returns 'Igpay Atin.lay' , with the period annoyingly in the middle of a word. How do I make it return 'Igpay Atinlay.' instead?

The function is:

function translatePigLatin(string) {
  var arr = string.split(' ');
  var str;
  for (var i = 0; i < arr.length; i++) {
    var j = 0;
    if (!/[\d]/.test(arr[i])) {
      while (/[^aeiou]/i.test(arr[i][j])) {
        j++;
      }
      if (j > 0) {
        arr[i] = arr[i].slice(j) + arr[i].slice(0, j) + 'ay';
      } else {
        arr[i] = arr[i] + 'way';
      }
    }
    if (/[A-Z]/.test(arr[i])) {
      arr[i] = toTitleCase(arr[i]);
    }
  }
  return arr.join(' ');
}

function toTitleCase(str) {
  return str.replace(/\w\S*/g, function(txt) {
    return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
  });
}

Answer 1

You could use this function:

function punct(str)
{
  var punctuation = ".,!@#$";
  var matches = 0;
  for(var i=0;i<str.length-matches;i++)
  {
    if(punctuation.indexOf(str[i])!=-1)
    {
      str = str.substr(0,i) + str.substr(i+1)+str[i--];
      matches++;
    }
  }
  return str;
}

which loops through your string using a for loop and if it finds a character within the punctuation string, it moves that character at the end of the string.So punct("Igpay Atin.lay") yields "Igpay Atinlay.".Give it a shot.