BetterMap | /mod.ts | bettermap@v1.3.0

An extension of the Map class with more Array-like features.

Latest

method BetterMap.prototype.firstKey

import { BetterMap } from "https://deno.land/x/bettermap@v1.3.0/mod.ts";

firstKey(): K | undefined

Get the first (n) element's key from the map.

firstKey(n: number): K[]

Get the first (n) element's key from the map.

const map = new BetterMap<string, number>("People");
map.set("Doraemon", 10);
map.set("Dora", 28);
console.log(map.firstKey()); // Doraemon

Returns

K | undefined

The first element's key / undefined.

n: number

K[]