Getting the last item from a Map – a simple solution?

I found some answers suggesting iterating through the Map, setting the iterated element to a variable and then reading it after the iteration. But isn’t there any better, more elegant view? I could not find a better solution so far.

>Solution :

You can convert the Map to an array of entries, then get the last element.

const map = new Map([['a', 1], ['b', 2], ['c', 3]]);
let lastEntry = [...map].at(-1);
console.log(lastEntry);

// or only get last key/value
let lastKey = [...map.keys()].at(-1);
let lastValue = [...map.values()].at(-1);
console.log(lastKey, lastValue);

However, it’s more efficient to just iterate over the entries and keep the last one.

const map = new Map([['a', 1], ['b', 2], ['c', 3]]);
let entry; for (entry of map);
console.log(entry);