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@any86/array-to-tree
Advanced tools
🌲 数组转树
npm i -S @any86/array-to-tree
const tree = arr2tree(array);
// ======= 输入数组 🍔:=======
const array = [
{
id: 1,
name: "蔬菜",
order: 1,
},
{
id: 2,
name: "土豆",
pid: 1,
order: 2,
},
{
id: 3,
name: "豆角",
pid: 1,
order: 1,
},
{
id: 4,
name: "水果",
order: 2,
},
];
// ======= 输出 🌲:=======
[
{
id: 1,
name: "蔬菜",
order: 1,
children: [
{
id: 3,
name: "豆角",
pid: 1,
order: 1,
},
{
id: 2,
name: "土豆",
pid: 1,
order: 2,
},
],
},
{
id: 4,
name: "水果",
order: 2,
},
];
我们可以通过参数来兼容不同业务下的键值:
const arr = [
{ xxid: 1, xxorder: 1 },
{ xxid: 2, xxpid: 1, xxorder: 2 },
];
arr2tree(arr, {
KEY_ID: "xxid",
KEY_PID: "xxpid",
});
注意不要删除或者结构node, 这里只可以对他附加属性, 否则无法形成树. 这里相当于遍历节点, 所以一些需要虚幻的操作可以放在这里.
const array = [
{ id: 1, order: 1 },
{ id: 2, pid: 1, order: 2 },
];
function transform(node: any) {
if (2 === node.id) {
node.category = "植物";
}
return node;
}
// 输出
// [{ id: 1, order: 1, children: [{ id: 2, pid: 1, order: 2, category: '植物' }] }]
默认情况下arr2tree通过判断"节点上的KEY_PID对应的属性是否 false"来区分根/子节点. 也就是值为空或者小于 1 的值都会当做父节点.
内部逻辑:
const isRoot = (node) => !node[KEY_PID];
如果不满足也可通过自定义isRoot来设置判断函数:
arr2tree(arr, {
isRoot: (node) => node.iAmRoot,
});
默认根据节点的 order 字段倒序排列,比如:
arr2tree([
{ id: 1, order: 1 },
{ id: 2, order: 2 },
]); // [{id:2,order:2},{id:1,order:1}]
现实中你可能需要正序, 更可能没有 order 字段, 所以通过compareOrder函数可以调整.
// 根据"x"排序, 并且正序.
arr2tree(
[
{ id: 2, x: 2 },
{ id: 1, x: 1 },
],
{
compareOrder(a, b) {
return b.x - a.x;
},
}
); // [{id:1,x:1},{id:2,x:2}]
FAQs
The npm package @any86/array-to-tree receives a total of 10 weekly downloads. As such, @any86/array-to-tree popularity was classified as not popular.
We found that @any86/array-to-tree demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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