在vanilla JavaScript中，我如何从这个对象中找到唯一的位置并使它们成为键，并将具有该位置的所有项目作为值放置。（如有必要，可以安装 lodash）。所以这个：[ { "item": { "id": "cat" }, "location": { "id": "porch" } }, { "item": { "id": "dog" }, "location": { "id": "porch" } }, { "item": { "id": "snake" }, "location": { "id": "forest" } }, { "item": { "id": "bird" }, "location": { "id": "forest" } }, { "item": { "id": "beer" }, "location": { "id": "fridge" } }]变成这样：[ { "porch": [ { "id": "cat" }, { "id": "dog" } ] }, { "forest": [ { "id": "snake" }, { "id": "bird" } ] }, { "fridge": [ { "id": "beer" } ] }]笔修改所需的结果[ { "location": { "name": "porch", "items": [ { "title": "cat" }, { "title": "dog" } ] } }, { "location": { "name": "forest", "items": [ { "title": "snake" }, { "title": "bird" } ] } }, { "location": { "name": "fridge", "items": [ { "title": "beer" } ] } }]
1 回答
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let obj = [
{
"item": {
"id": "cat"
},
"location": {
"id": "porch"
}
},
{
"item": {
"id": "dog"
},
"location": {
"id": "porch"
}
},
{
"item": {
"id": "snake"
},
"location": {
"id": "forest"
}
},
{
"item": {
"id": "bird"
},
"location": {
"id": "forest"
}
},
{
"item": {
"id": "beer"
},
"location": {
"id": "fridge"
}
}
]
let result = {};
obj.forEach(({item, location}) => {
if(!result[location.id]) result[location.id] = []
result[location.id].push({title: item.id})
})
result = Object.keys(result).map(key => ({
"location": {
"name": key,
"items": result[key]
}
}))
result包含所需的输出。
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