我有以下查询字符串:
student.name.firstname=Foo&student.name.lastname=Bar&student.address=My%20Street
如何像这样转换为嵌套对象:
{
student:{
name:{
firstname: "Foo",
lastname: "Bar"
},
address: "My Street"
}
}
我尝试了以下代码,但是出了点问题:
function convertQueryToMap(query) {
var params = {};
var vars = query.split('&');
for (var i = 0; i < vars.length; i++) {
var pair = vars[i].split('=');
var subpairs;
if (pair[0].includes('.')) {
subpairs = pair[0].split('.');
var object = {};
subpairs.reduce(function(o, s, i) {
if (i === subpairs.length-1) {
return o[s] = decodeURIComponent(pair[1]);
} else {
return o[s] = {};
}
}, object);
}
}
return params;
}
您知道解决方案吗?
答案 0 :(得分:3)
您可以使用reduce
方法来创建嵌套结构,并可以使用split
方法来基于&
首先对部件进行查询拆分,还可以从每个部件中获取键和值。
const query = 'student.name.firstname=Foo&student.name.lastname=Bar&student.address=My%20Street'
const toObject = string => {
return string.split('&').reduce((r, s) => {
const [key, val] = s.split('=');
key.split('.').reduce((a, e, i, ar) => {
return a[e] || (a[e] = (ar[i + 1] ? {} : val.replace(/%20/g, ' ')))
}, r);
return r;
}, {})
}
const result = toObject(query);
console.log(result)
答案 1 :(得分:1)
您可以解码字符串,拆分为部分,然后拆分为键和值,然后将值分配给嵌套对象。
function setValue(object, keys, value) {
var last = keys.pop();
keys.reduce((o, k) => o[k] = o[k] || {}, object)[last] = value;
}
var string = 'student.name.firstname=Foo&student.name.lastname=Bar&user.address=My%20Street',
result = {};
decodeURI(string).split('&').forEach(s => {
var [key, value] = s.split('=');
setValue(result, key.split('.'), value);
});
console.log(result);
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