CODEWITHSUNDEEP
javascriptreactjsdictionary
Sakshi
Sakshi

Reputation: 1548

How to fetch first value from a map in react

I have a map in react with key and value both as string,like below:

let map=new Map();
map.set("foo","bar");
map.set("foo-bar","bar-foo");

How can i fetch the first value from this map ?

Upvotes: 0

Views: 1515

Answers (1)

Ahmad
Ahmad

Reputation: 12737

You can use map built in keys() method that returns an iterator. Then you can call .next() on the iterator to fetch the first item.

The item is an object, so you will need to use the property value.

let map=new Map();
map.set("foo","bar");
map.set("foo-bar","bar-foo");

const keysIterator = map.keys();
const firstKeyObject = keysIterator.next();
const firstKey = firstKeyObject.value;

console.log(map.get(firstKey));


// or simply:
console.log(map.get( map.keys().next().value ));

Upvotes: 2

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