JavaScript进行数据比对

直接上代码了，使用在vue中

/**
     * 被修改的详细数据
     */
    modifyDetailInfo(){
      let oldData = this.baseData; //更新前的数据
      let newData = this.form; //更新后的数据
      let result = {};
      result = this.modifyMethod(oldData, newData, result); //调用计算方法
      return result;
    },
    /**
     * 计算修改的方法
     */
    modifyMethod(oldData, newData, result){
      let propArray = Object.keys(newData); //取出更新后的成员属性值
      for (var prop of propArray) {
        let strConstructor = newData[prop] != null ? newData[prop].constructor.toString() : "";
        let strPre = "function "; //字符串前缀
        let idx = strConstructor.indexOf("()"); //找到索引值
        let type= strConstructor.substr(strPre.length, idx-strPre.length); //计算出类型
        if(type === "String" || type === "Number"){ //当为叶子节点时
          if(newData[prop] != oldData[prop]){
            let data = {};
            data.before = oldData[prop];
            data.after = newData[prop];
            result[prop] = data;
          }
        }else if (type === "Object"){ //当为对象类型时
            let subresult = {}; //子结果
            let subOldData = oldData[prop]; //子节点更新前的数据
            let subNewData = newData[prop]; //子节点更新后的数据
            this.modifyMethod(subOldData, subNewData, subresult); //进行递归调用
            if(Object.keys(subresult).length > 0){
              result[prop] = subresult;
            }
        }else if(type === "Array"){ //当为数组类型时
            let subOldData = oldData[prop]; //子节点更新前的数据
            let subNewData = newData[prop]; //子节点更新后的数据
            let len = subNewData.length; //数组的长度
            let arrayResult = [];
            for(let i=0; i<len; i++){
              let subresult = {}; //子结果
              this.modifyMethod(subOldData[i], subNewData[i], subresult); //进行递归调用
              if(Object.keys(subresult).length > 0){
                subresult.modifyIndex = i; //记录索引值
                arrayResult.push(subresult);
              }
            }

            if(arrayResult.length > 0){
              result[prop] = arrayResult;
            }
        }else{
          continue;
        }
      }

      return result;
    },