str = {a.b.c:1,a.b.d:2}转换为{a:{c:1,d:2}}

Question

如何把str = {a.b.c:1,a.b.d:2,b.a.c:2,b.a.s:9}转换为{a:{c:1,d:2},b:{a:{c:2,s:9}}

Answer 1

用lodash

var o = {}
Object.entries(str).forEach(([k,v])=>{_.set(o,k,v)})

Answer 2

function setValue(o, k, v){
    let keyArr = k.split('.');
    let tempObj = o, i = 0
    for (let len = keyArr.length; i < len - 1; ++i) {
        let key = keyArr[i];
        if (!tempObj[key]) {
            tempObj[key] = {}
        };
        tempObj = tempObj[key]
    }

    tempObj[keyArr[i]] = v
    return o
}

Object.entries(str).reduce((o, [k, v]) => setValue(o, k, v), {})