code: function (value, prefix, leftJustify, minWidth, zeroPad, customPadChar) {
                  var diff = minWidth - value.length;
                  if (diff > 0) {
                      if (leftJustify || !zeroPad) {
                          value = pad(value, minWidth, customPadChar, leftJustify);
                      } else {
                          value = value.slice(0, prefix.length) + pad('', diff, '0', true) + value.slice(prefix.length);
                      }
                  }
                  return value;
              }
docs: justify()