@extra-map/has v2.2.15

Checks if map has a key. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: has, hasValue, hasEntry, hasSubset, hasPath. Similar: key, keys, has.

This is part of package extra-map.

map.has(x, k);
// x: a map
// k: key?

const map = require("extra-map");

var x = new Map([["a", 1], ["b", 2], ["c", -3]]);
map.has(x, "d");
// false

map.has(x, "c");
// true

References

• Array.prototype.includes: MDN web docs
• array-tools.contains: @75lb