if a value is equal to an object's key in an array of objects, return that object's value javasciprt

Question

I have this array of objects:

myArray=[
{name: 'joe', value: 'joe rogan'},
{name: 'sarah', value: 'sarah rogan'},
{name: 'jack', value: 'jack rogan'},
{name: 'steph', value: 'steph rogan'}
]

I wanna see if myArray's names include 'sarah' then return its value which is 'sarah rogan'. I have tried:

const myName = myArray.map(o => o.name === 'sarah' ? o.value : "")

But it returns an array with two values. How can I just get 'sarah''s value which is 'sarah rogan' as a string?

score 3 · Answer 1 · answered Aug 19 '20 at 03:50

3

You can use Array#find.

const myArray=[
  {name: 'joe', value: 'joe rogan'},
  {name: 'sarah', value: 'sarah rogan'},
  {name: 'jack', value: 'jack rogan'},
  {name: 'steph', value: 'steph rogan'}
];
let obj = myArray.find(({name})=>name==='sarah');
if(obj) console.log(obj.value);

answered Aug 19 '20 at 03:50

Unmitigated

76,500
11
62
80

2

Now you have a gold badge you should use it to hammer these duplicates... – Nick Aug 19 '20 at 04:04
What do you mean by duplicates? Is this a repeat question? – Liew Xun Aug 19 '20 at 05:18

score 2 · Accepted Answer · answered Aug 19 '20 at 03:52

2

const myName = myArray.find(x => x.name === 'sarah').value

answered Aug 19 '20 at 03:52

vritser

46
2

Liew Xun · Answer 3 · 2020-08-19T05:17:17.403

1

You can use filter as well. This will return all matches as an Array unlike find which returns the first match.

myArray=[
{name: 'joe', value: 'joe rogan'},
{name: 'sarah', value: 'sarah rogan'},
{name: 'jack', value: 'jack rogan'},
{name: 'steph', value: 'steph rogan'}
]

// filter the array and get the first item
const myName = myArray.filter(o => o.name === 'sarah')[0]

console.log(myName.value)

edited Aug 19 '20 at 05:17

answered Aug 19 '20 at 03:57

Liew Xun

99
5

score 1 · Answer 4 · answered Aug 19 '20 at 03:58

With a for loop:

myArray=[
{name: 'joe', value: 'joe rogan'},
{name: 'sarah', value: 'sarah rogan'},
{name: 'jack', value: 'jack rogan'},
{name: 'steph', value: 'steph rogan'}
]

for(let i = 0; i < myArray.length; i++){
    if(myArray[i].name === 'sarah'){
        console.log(myArray[i]);
    }
}

if a value is equal to an object's key in an array of objects, return that object's value javasciprt

4 Answers4