Find user details by ID in nested object nodejs | javascript

Question

How to find name using id. means iterate object. create a function const searchName =()=>{} suppose if pass 3 in function so I'd want to show .... what the name of user like this

const data = [{
    "service": [
        "BUSINESS",
        "LEGAL",
        "FINANCE",
        "ADVERTISEMENT"
    ],
    "service1": [
        { "id": 1, "name": "a" },
        { "id": 2, "name": "b" },
        { "id": 3, "name": "c" },
        { "id": 4, "name": "d" },
    ],
    "service2": [
        { "id": 5, "name": "e" },
        { "id": 6, "name": "f" },
        { "id": 7, "name": "g" },
        { "id": 8, "name": "h" },
    ],
    "service3": [
        { "id": 9, "name": "i" },
        { "id": 10, "name": "j" },
        { "id": 11, "name": "k" },
        { "id": 12, "name": "l" },
    ],
    "service4": [
        { "id": 13, "name": "m" },
        { "id": 14, "name": "n" },
        { "id": 15, "name": "o" },
        { "id": 16, "name": "p" },
    ],
}
]

suppose user pass 3 so I want to return { "id": 3, "name": "c" } like this. I'm trying to iterate this and find the name of the user by id but I didn't understand this iteration so I need your help.

Gagan Rihal · Accepted Answer · 2022-03-28 14:16:06Z

check this code.... Enter any id number

const data = [{
                    "service": [
                        "BUSINESS",
                        "LEGAL",
                        "FINANCE",
                        "ADVERTISEMENT"
                    ],
                    "service1": [
                        { "id": 1, "name": "a" },
                        { "id": 2, "name": "b" },
                        { "id": 3, "name": "c" },
                        { "id": 4, "name": "d" },
                    ],
                    "service2": [
                        { "id": 5, "name": "e" },
                        { "id": 6, "name": "f" },
                        { "id": 7, "name": "g" },
                        { "id": 8, "name": "h" },
                    ],
                    "service3": [
                        { "id": 9, "name": "i" },
                        { "id": 10, "name": "j" },
                        { "id": 11, "name": "k" },
                        { "id": 12, "name": "l" },
                    ],
                    "service4": [
                        { "id": 13, "name": "m" },
                        { "id": 14, "name": "n" },
                        { "id": 15, "name": "o" },
                        { "id": 16, "name": "p" },
                    ],
                }]
            var itemobj = ''
            const searchName =(val)=>{
                    console.log('searchname')
                    data.map((item)=>{
                        let obj = Object.keys(item)            
                        obj.map((data)=>{
                            let inrdata = item[data]
                            inrdata.map((initem)=>{                    
                                 let lastdata = initem.id===val?itemobj=initem:null  
                                  
                                
                            })

                        })
                    })
                }
                
            searchName(3)
             console.log(itemobj)

aymcg31 · Accepted Answer · 2022-03-28 13:26:47Z

1

function searchName(id) {
let result = null;
  for (const [key, value] of Object.entries(data)) {
    if (key === "service") continue
    result = value.filter(obj => {
        return obj.id === id
        })
    if (result) break
  }
  return result ? result[0] : null
}

I iterate through keys, I just skip "service" one since it's not revelant. Then, I filter the "serviceN" array, it will return an array of object (only one if found, empty array if not found).

If it's found, we stop iterating.

Then we return either the first (and logically only element) or null if not found

answered Mar 28, 2022 at 13:26

aymcg31

9497 silver badges13 bronze badges

Comments

marcobiedermann · Accepted Answer · 2022-03-28 13:38:52Z

1

You could use a combination of flat and find to get get the user by id

function searchName(id) {
  return data
    .flatMap((item) => Object.values(item))
    .flat()
    .find((user) => user.id === id);
}

const result = searchName(3); // { id: 3, name: 'c' } | undefined

answered Mar 28, 2022 at 13:38

marcobiedermann

4,9635 gold badges28 silver badges40 bronze badges

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