[英]Get path of value in object from nested array
我怎樣才能得到這個嵌套數組中嵌套值的路徑:
const categories = [
{
name: 'category1',
subcategories: [
{
name: 'category2',
subcategories: [],
},
{
name: 'category3',
subcategories: [
{
name: 'category4',
subcategories: [],
},
],
},
],
},
{
name: 'category5',
subcategories: [],
},
];
我需要實現一個 function ,它將返回如下內容:
console.log(getCategoryPath(categories, 'category4')); // 應該 output: '/category1/category3/category4'
到目前為止,我有:
const getCategoryPath() = (categories, categoryName) {
if (category.name === categoryName) {
path = `/${category.name}`;
} else {
category.subcategories.find((firstLevelSubcategory) => {
if (firstLevelSubcategory.name === categoryName) {
path = `/${firstLevelSubcategory.name}`;
} else {
firstLevelSubcategory.subcategories.find(
(secondLevelSubcategory) => {
if (secondLevelSubcategory.name === categoryName) {
path = `/${secondLevelSubcategory.name}`;
}
}
);
}
});
}
}
例如,這會打印匹配的類別名稱/category4
,但我需要打印該值/category1/category3/category4
的整個路徑。
在這種情況下,我無法識別匹配categoryName
的父母/父母。 我可以對這個問題使用遞歸嗎?如果可以,我該如何應用它?
您可以應用遞歸:
const categories = [ { name: 'category1', subcategories: [ { name: 'category2', subcategories: [], }, { name: 'category3', subcategories: [ { name: 'category4', subcategories: [], }, ], }, ], }, { name: 'category5', subcategories: [], },]; const getNestedPath=(arr,name)=>{ for(let item of arr){ if(item.name===name) return `/${name}`; if(item.subcategories) { const child = getNestedPath(item.subcategories, name); if(child) return `/${item.name}${child}` } } }; console.log(getNestedPath(categories, 'category4'));
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