更改对象基于结构的条件

Question

我有一个类似下面的对象，

我正在尝试基于父子关系改革对象结构。

var b = [];
for(var i=0;i<a.length;i++){
if(a[i].parent == null){
const children = a.filter(x => a[i].parent == null && a[i].id == x.parent);
b.push({'name':a[i].name,'type':'grandparent','children':children})
}

}

我封存了祖父母和子女，但被困在子子女中。

Answer 1

您可以使用reduce()方法并为此创建递归函数。

 var a = [{"id":0,"name":"Node 0","thumbnail":{"description":"Random Picture","href":""},"parent":null},{"id":1,"name":"Node 1","thumbnail":{"description":"Another Random Picture","href":""},"parent":0},{"id":2,"name":"Node 2","thumbnail":{"description":"A Picture Is Random","href":""},"parent":null},{"id":3,"name":"Node 3","thumbnail":{"description":"Picture, Random","href":""},"parent":1}] function nested(arr, parentId) { return arr.reduce(function(r, e) { if (e.parent == parentId) { const children = nested(arr, e.id); const clone = Object.assign({}, e); if (children.length) clone.children = children r.push(clone) } return r; }, []) } const result = nested(a); console.log(result)