如何在JavaScript中将普通对象数组转换为多级数组? [英] How can I convert normal array of objects to multilevel array in javascript?
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问题描述
我的普通数组对象是这样的:
My normal array object like this :
var b = [
{id: 1, name: 'England',parent_id: null},
{id: 2, name: 'Spain',parent_id: null},
{id: 3, name: 'Chelsea',parent_id: 1},
{id: 4, name: 'Manchester United',parent_id: 1},
{id: 5, name: 'Real Madrid',parent_id: 2},
{id: 6, name: 'Barcelona',parent_id: 2},
{id: 7, name: 'Hazard',parent_id: 3},
{id: 8, name: 'Morata',parent_id: 3},
{id: 9, name: 'Pogba',parent_id: 4},
{id: 10, name: 'Lukaku',parent_id: 4},
{id: 11, name: 'Ronaldo',parent_id: 5},
{id: 12, name: 'Bale',parent_id: 5},
{id: 13, name: 'Messi',parent_id: 6},
{id: 14, name: 'Suarez',parent_id: 6},
];
我想将对象数组转换成这样:
I want to convert the object array to be like this :
var b = [
{
name: 'England',
children: [
{
name: 'Chelsea',
children: [
{name: 'Hazard'},
{name: 'Morata'}
]
},
{
name: 'Manchester United',
children: [
{name: 'Pogba'},
{name: 'Lukaku'}
]
}
]
},
{
name: 'Spain',
children: [
{
name: 'Real Madrid',
children: [
{name: 'Ronaldo'},
{name: 'Bale'}
]
},
{
name: 'Barcelona',
children: [
{name: 'Messi'},
{name: 'Suarez'}
]
},
]
}
];
似乎它将使用键parent_id分隔
It seems it will be separated using key parent_id
但是我仍然对实现它感到困惑
But i'm still confused to implement it
我该如何转换数组对象?
How can I convert the array object like that?
请帮助我
推荐答案
-
.filter()
b
,因此它仅包含带有parent_id: null
的项目
-
.map()
剩余的物品,给他们分配孩子 -
.map()
每个根级父级的子级不带parent_id
字段(可选,不在示例中)返回它们
.filter()
theb
so it contains only items withparent_id: null
.map()
remaining items, assigning children to them.map()
children for each of the root level parents to return them withoutparent_id
field (optional, not in the example)
var b = [
{id: 1, name: 'England',parent_id: null},
{id: 2, name: 'Spain',parent_id: null},
{id: 3, name: 'Chelsea',parent_id: 1},
{id: 4, name: 'Manchester United',parent_id: 1},
{id: 5, name: 'Real Madrid',parent_id: 2},
{id: 6, name: 'Barcelona',parent_id: 2},
{id: 7, name: 'Hazard',parent_id: 3},
{id: 8, name: 'Morata',parent_id: 3},
{id: 9, name: 'Pogba',parent_id: 4},
{id: 10, name: 'Lukaku',parent_id: 4},
{id: 11, name: 'Ronaldo',parent_id: 5},
{id: 12, name: 'Bale',parent_id: 5},
{id: 13, name: 'Messi',parent_id: 6},
{id: 14, name: 'Suarez',parent_id: 6},
];
const done = b.filter(person => !person.parent_id).map(person => {
return {
id : person.id,
name : person.name,
children: b.filter(child => child.parent_id == person.id)
}
});
console.log(done);
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