CODEWITHSUNDEEP
typescriptfind
atamata
atamata

Reputation: 1077

Typescript find() and return index

Is it possible to return the array index using the array.find() method in typescript?

eg, I have an array of objects and can return an object using find on a object property name, but can I also somehow return the index of that item in the array?

Upvotes: 1

Views: 11609

Answers (3)

Ahron M. Galitzky
Ahron M. Galitzky

Reputation: 2261

The above answers are correct that to get index you use .findIndex() & to get the actual entry of the array you use .find()

However, it seems to me like you are asking how to get the index plus the entry in the array at once.

If I am correct you can try something like:

    let array  = ["Sunday", "Monday", "Tuesday", "Wednesday", "Friday", "Saturday"];
                
    let tuesday = array.map((day,index) => {
       if(day == "Tuesday")
         return {day, index}
    }).filter(day => day)[0];

    console.log(tuesday);

You should get back an object with the entry & the index like this:

{"day": "Tuesday", "index": 2}

I am not sure if this is the cleanest way of getting them both at once, but it works.

Upvotes: 2

Ryan Le
Ryan Le

Reputation: 8422

For finding index, you could use Array.findIndex

Something like this:

const array1 = [5, 12, 8, 130, 44];

console.log(array1.findIndex((element) => element > 13));

And then to get actual value from that Index:

const array1 = [5, 12, 8, 130, 44];

const idx = array1.findIndex((element) => element > 13);

console.log(array1[idx])

Upvotes: 2

Iván
Iván

Reputation: 1060

find returns the element. findIndex returns the index.

findIndex documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex

Upvotes: 2

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