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
};