[英]LoDash - DeepFlatten array of objects
I have the following collection. 我有以下收藏。 Each object may have a children
array of objects, which may have a children
array of objects and so on... 每个对象可能有一个children
对象数组,可能有一个children
对象数组,依此类推......
[
{
"name": "John",
"age": 24,
"children": [
{
"name": "Jack",
"age": 53,
"children": [
{
"name": "Jenny",
"age": 88
}
]
}
]
},
{
"name": "George",
"age": 45,
"children": [
{
"name": "Chris",
"age": 38,
"children": [
{
"name": "Nick",
"age": 35,
"children": [
{
"name": "Maria",
"age": 63
}
]
}
]
}
]
}
]
I want to recursively flatten the collection in order to have the following result: 我想以递归方式展平集合,以获得以下结果:
[
{
"name": "John",
"age": 24
},
{
"name": "Jack",
"age": 53
},
{
"name": "Jenny",
"age": 88
},
{
"name": "George",
"age": 45
},
{
"name": "Chris",
"age": 38
},
{
"name": "Nick",
"age": 35
},
{
"name": "Maria",
"age": 63
}
]
How can i do this in lodash.js?
我怎么能在lodash.js?
这样做lodash.js?
Try: 尝试:
var data=[{"name":"John","age":24,"children":[{"name":"Jack","age":53,"children":[{"name":"Jenny","age":88}]}]},{"name":"George","age":45,"children":[{"name":"Chris","age":38,"children":[{"name":"Nick","age":35,"children":[{"name":"Maria","age":63}]}]}]}] function getPeople(persons){ var result = []; _.each(persons, function(person){ result.push({name: person.name, age: person.age}); person.children && (result = _.union(result,getPeople(person.children))) }); return result } document.write(JSON.stringify(getPeople(data)))
<script src="https://lodash.com/_js/lodash.js"></script>
You can do it with a recursive function calling itself on each children element and concatenating it in the same array: 您可以使用递归函数来调用每个子元素并将其连接在同一个数组中:
function listPeople(list) {
var people = [];
for (var person in list) {
people.push({name: person.name, age: person.age});
if (person.children) {
var children = listPeople(person.children);
people = people.concat(children);
}
}
return people;
}
Then just give it your first array, and the second should be returned. 然后给它你的第一个数组,第二个应该返回。
You can try: 你可以试试:
var _ = require('lodash');
var a = [
{
"name": "John",
"age": 24,
"children": [
{
"name": "Jack",
"age": 53,
"children": [
{
"name": "Jenny",
"age": 88
}
]
}
]
},
{
"name": "George",
"age": 45,
"children": [
{
"name": "Chris",
"age": 38,
"children": [
{
"name": "Nick",
"age": 35,
"children": [
{
"name": "Maria",
"age": 63
}
]
}
]
}
]
}
];
var list = [];
function filter(arr, items){
if(_.isArray(arr) && _.isArray(items)){
_.forEach(items, function(item){
if(item.name && item.age) {
arr.push({
name: item.name,
age: item.age
});
}
if(item.children && _.isArray(item.children)){
filter(arr,item.children);
}
});
}
}
filter(list, a);
console.log(list);
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