var formatString = {
  strSub: function (str, n) {
    var result = str
    if (str.length > n) {
      result = str.substring(0, n) + '...'
    }
    return result
  },
  strCut: function (str, start, end) {
    var result = str.substring(start, end)
    return result
  }
}

module.exports = {
  strSub: formatString.strSub,
  strCut: formatString.strCut
}