How to get the first key (not value) of immutable.js map?

Question

How to get the first key (not value) of immutable.js map?

basically myMap.first() will return the value, but I am interested in the key...

I can do a forEach and store first, but must be a better way!

didn't see it in the docs, prob missing it... :/

tx

Sean

Answer 1

Do this -

var firstKey = map.keySeq().first();

Explanation - Get me a lazy sequence of keys of this map, then resolve the first key. Alternatively you can use keys() method which returns plain old ES6 iterator. It will be less performant though.