var sub = function (val) {
  if (val.length == 0 || val == undefined) {
    return;
  }

  if (val.length > 17) {
    return val.substring(0, 17) + "...";
  } else {
    return val.substring(0, 1);
  }
};

var filters = {
  toFloat: function (value) {
    return parseFloat(value);
  },
  toStr: function (value) {
    return value.toString();
  },
  toNum: function (value) {
    return value.toNumber();
  }
};

var spl = function (str) {
  return str.split(",");
};

module.exports = {
  toFloat: filters.toFloat,
  toStr: filters.toStr,
  toNum: filters.toNum,
  //暴露接口调用
  sub: sub,
  spl: spl
};