JS 处理Json对象

Question

有道JS题，如下：

要求：
Num的值在区间0~6之间，在json对象上加上键值对 'a':0；
Num的值在区间6~12之间，在json对象上加上键值对 'a':1；
Num的值在区间12~18之间，在json对象上加上键值对 'a':2；
Num的值在区间18~24之间，在json对象上加上键值对 'a':3；

结果这样：

因为最近大量做JS的数据处理，看了一些JS题，上网请教下其他朋友的思路和方法。谢谢

Answer 1

这是，我个人觉得还是先对JSON进行遍历，针对不同的Num值，得到不同的a值，然后用字符串吧这些加起来，然后在调用JSON.parse()函数进行字符串到json的转换。我简单的写了个小函数，你可以参考下！！&nbsp; &nbsp; function jsonAdd(json) {&nbsp; &nbsp; &nbsp; &nbsp; var nArr=[];&nbsp; &nbsp; &nbsp; &nbsp; var ss='[';&nbsp; &nbsp; &nbsp; &nbsp; json.map((x)=>{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; var num=parseInt(x.Num);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ss+='{"Num":'+num+","+'"a:":';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(num>0&&num<=6){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ss+='0},';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else if(num>6&&num<=12){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ss+='1},';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else if(num>12&&num<=18){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ss+='2},';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else if(num>18&&num<=24){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ss+='3},';&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; })&nbsp; &nbsp; &nbsp; &nbsp; ss = ss.substring(0, ss.length - 1);&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; ss+="]";&nbsp; &nbsp; &nbsp; &nbsp; return JSON.parse(ss);&nbsp; &nbsp; }调用函数，传入原始数据，返回一个修改后的数据.

Answer 2

别人说Map一下没说错啊，另外json的属性名是双引号。拿走不谢var obj = json.map(function (t) {&nbsp; &nbsp; var val = +t['Num'];&nbsp; &nbsp; t['"a"'] = Math.floor(val/6).toString();&nbsp; &nbsp; return t;});