[英]How to filter and arrange object array based on attributes
我有項目的JSON數組:
var items = [
{
Id: "c1",
config:{
url:"/c1",
content: "c1 content",
parentId: "p1",
parentUrl: "/p1",
parentContent: "p1 content",
}
},
{
Id: "c2",
config:{
url:"/c2",
content: "c2 content",
parentId: "p1",
parentUrl: "/p1",
parentContent: "p1 content",
}
},
{
Id: "c3",
config:{
url:"/c3",
content: "c3 content"
}
},
]
結果應該是這樣的:
var items = [
{
Id: "p1",
config:{
url:"/p1",
content: "p1 content"
},children:[
{
Id: "c1",
config:{
url:"/c1",
content: "c1 content"
}
},{
Id: "c2",
config:{
url:"/c2",
content: "c2 content"
}
},
]
},
{
Id: "c3",
config:{
url:"/c3",
content: "c3 content"
}
},
]
如果對象具有父級屬性,則應將其包裝在父級的子級道具下。 我發現很難轉換它。 有人可以幫我嗎? 謝謝。
此代碼未經測試,但希望對您有所幫助:
var new_items = [];
for(i in items) {
var id = items[i].config.parentId;
if(id) {
if(!(parent = get_parent(id))) { // If the new list does not contain the parent...
parent = {Id: id, config: {
url: items[i].config.parentUrl,
content: items[i].config.parentContent,
//... The parent attributes
}, children: []};
}
parent.children.push({/* The child object attributes*/});
}
}
function get_parent(id) {
for(ni in new_itmes) {
if(new_items[ni].Id == id) return new_items[ni];
}
return false;
}
要處理的數組(請注意,我為p1添加了一個項目):
var items = [{
Id: "p1",
config:{}
},{
Id: "c1",
config:{
url:"/c1",
content: "c1 content",
parentId: "p1",
parentUrl: "/p1",
parentContent: "p1 content",
}
},{
Id: "c2",
config:{
url:"/c2",
content: "c2 content",
parentId: "p1",
parentUrl: "/p1",
parentContent: "p1 content",
}
},{
Id: "c3",
config:{
url:"/c3",
content: "c3 content"
}
},
];
處理數組:
orphans = [];
parents = {};
items.forEach(function(item){
parents[item.Id]=item;
});
items.forEach(function(item){
var parent = parents[item.config.parentId];
if (parent){
parent.children = parent.children || [];
parent.children.push(item);
}else{
orphans.push(item);
}
});
console.log('Processed array:', orphans);
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