搜索javascript对象返回相关的caid

Question

我有以下javascript数组，我试图简单地返回catId的id-例如，如果我搜索10000356的id，我想返回4的值。我该怎么做呢?

categoryIds = [
{
"id": 10000282,
"catId": 0
},
{
"id": 10000340,
"catId": 0
},
{
"id": 10000341,
"catId": 0
},
{
"id": 10000334,
"catId": 1
},
{
"id": 10000333,
"catId": 2
},
{
"id": 10000336,
"catId": 2
},
{
"id": 10000337,
"catId": 3
},
{
"id": 10000356,
"catId": 4
}
]

categoryIds.filter(id => id == 10000356);

预期结果:

4 - the catId for `10000356` is the integer 4.

Answer 1

const result = categoryIds.find((data) => data?.id === 10000356); // beware result can be null
// use ?. to avoid error if data is null
// rembere that you have an array of object not of id ;)
console.log("the catId for 10000356 is the integer " + result?.catId);

使用find如果你确定id是唯一的，我认为这是这种情况。Find将返回所需的数据，如果未找到则返回null