如何把str = {a.b.c:1,a.b.d:2,g.h.u:2,g.h.t:9}转换为{a:{b:{c:1,d:2}},g:{h:{u:2,t:9}}

Question

如何把str = {a.b.c:1,a.b.d:2,g.h.u:2,g.h.t:9}转换为{a:{b:{c:1,d:2}},g:{h:{u:2,t:9}}

Answer 1

以下代码采用递归执行，不论有多少层级，都可以封装

let str = {
    'a.b.c': 1,
    'a.b.d': 2,
    'g.h.u': 2,
    'g.h.t': 9,
    'g.h.k.l': 5,
}
let result = {};
function assemble(index, keys, value, obj) {
    if (index == keys.length - 1) {
        obj[keys[index]] = value;
        return;
    } else {
        if(!obj[keys[index]]){
            obj[keys[index]] = {};
        }
        assemble(index+1, keys, value, obj[keys[index]]);
    }
}
for (let item in str) {
    let keys = item.split(".");
    assemble(0, keys, str[item], result);
}
console.log(result)