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How do you get the key at specifc index in javascript map object?

Suppose I have the following map object

const items = new Map([['item1','A'], ['item2','B'], ['item3', 'C']])

I want to fetch the key at index 2. Is there a way other than using a for loop to get the key of item at index = 2 ?

Got this working as per the answer -

Array.from(items.keys())[2]
like image 351
Akhil Avatar asked Jun 14 '16 21:06

Akhil


2 Answers

To fetch the key at index 2, do the following:

// Your map
var items = new Map([['item1','A'], ['item2','B'], ['item3', 'C']]);

// The key at index 2
var key = Array.from(items.keys())[2];                 // Returns 'item3'

// The value of the item at index 2
var val1 = items.get(key);                             // Returns 'C'


// ... or ...
var val2 = items.get(Array.from(items.keys())[2]);     // Returns 'C'
like image 156
Greeso Avatar answered Sep 27 '22 22:09

Greeso


Maps might be ordered, but they are not indexed. The only way to get the nth item is a loop.

like image 43
Bergi Avatar answered Sep 27 '22 22:09

Bergi