Search javascript object to return the relevant catId

user_218725 0
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I have the following javascript array and I am trying to simply return the catId for an id - for instance if I search for the id of 10000356 I want to return the value of 4. How should I do this?

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);

Expected outcome :

4 - the catId for `10000356` is the integer 4.
javascript-objects filter search arrays javascript
1 Answers
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);

use find if you are sure that the id are unique and I think it's the case here. find will return the data you want and return null if not found

user_83316030
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