3 回答
TA贡献1946条经验 获得超4个赞
这非常接近。path考虑在递归函数中传递整个数组。以下是您完成此操作的稍微修改的版本。
function getPath(model, id, path) {
if (!path) {
path = [];
}
if (model == null) {
return;
}
if (model.id === id) {
console.log(model.id, path)
}
if (model.children) {
model.children.forEach(child => getPath(child, id, [...path, model.id]));
}
}
const object = {
id: "1",
name: "a",
children: [
{
id: "2",
name: "b",
children: [
{
id: "3",
name: "c"
}
]
},
{
id: "4",
name: "d"
}
]
};
getPath(object, "3");
TA贡献2019条经验 获得超9个赞
您可以使用短路来迭代子级并将函数的路径与目标对象一起移交。
function getPath(model, id) {
var path,
item = { id: model.id };
if (!model || typeof model !== 'object') return;
if (model.id === id) return [item];
(model.children || []).some(child => path = getPath(child, id));
return path && [item, ...path];
}
const object = { id: "1", name: "a", children: [{ id: "2", name: "b", children: [{ id: "3", name: "c" }] }, { id: "4", name: "d" }] };
console.log(getPath(object, '42')); // undefined
console.log(getPath(object, '3')); // [{ id: 1 }, { id: 2 }, { id: 3 }]
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TA贡献1829条经验 获得超4个赞
const object = {
id: "1",
name: "a",
children: [
{
id: "2",
name: "b",
children: [
{
id: "3",
name: "c"
},
{
id: "5",
name: "c"
}
]
},
{
id: "4",
name: "d"
}
]
};
const getPath = (obj, id, paths = []) => {
if (obj.id == id) return [{ id: obj.id }];
if (obj.children && obj.children.length) {
paths.push({ id: obj.id });
let found = false;
obj.children.forEach(child => {
const temPaths = getPath(child, id);
if (temPaths) {
paths = paths.concat(temPaths);
found = true;
}
});
!found && paths.pop();
return paths;
}
return null;
};
console.log(getPath(object, "5"));
console.log(getPath(object, "2"));
console.log(getPath(object, "3"));
console.log(getPath(object, "4"));
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