js 字典按照规则转为为字典序列

Question

有个字典,键值对是3的倍数，3N对键值对，例如下

var dic={
     brand_1=11,
    name_1=11,
     model_1=11,
     brand_2=22,
     name_2=22,
     model_2=22,
     brand_3=33,
     name_3=33,
     model_3=33
}

要转换成

var diclist=[
{ brand:11,name:11,model:11},
{ brand:22,name:22,model:22},
{ brand:33,name:33,model:33},
]

当然，每一组的{ brand:xx,name:xx,model:xx}, 要跟原来字典中key的最后那个数字对起来

有啥好的思路不？

Answer 1

如果对你有帮助的话，希望能够采纳支持一下！！！

 <script>
        var dic = {
            brand_1: 11,
            name_1: 11,
            model_1: 11,
            brand_2: 22,
            name_2: 22,
            model_2: 22,
            brand_3: 33,
            name_3: 33,
            model_3: 33
        };
        //转换函数
        function func(dic) {
            let res = [];
            //计算字典长度
            let size = Object.keys(dic).length;
            //初始化元素个数,如果字典长度为3N,那么初始化元素个数为N
            for (let i = 0; i < size / 3; i++) {
                res.push({});
            }
            //初始化元素索引值
            let i = 0;
            //累加指针
            let j = 0;
            //遍历字典
            for (let key in dic) {
                //获取字典的key值
                let k = key.substr(0, key.indexOf("_"));
                //赋值操作
                res[i][k] = dic[key];
                //累加+1
                j++;
                //每循环到3的倍数的时候，索引值自增1
                if (j % 3 == 0) i++;
            }
            //返回结果
            return res;
        }
        //打印输出结果
        console.log(func(dic))
    </script>

运行结果：