findOrThrow

function Map.findOrThrow<K, V>(
    target: ReadonlyMap<K, V>,
    predicate: (
        value: NoInfer<V>,
        key: NoInfer<K>,
        target: ReadonlyMap<K, V>,
    ) => boolean,
): V

Returns the first value in the map that satisfies the provided predicate function, or throws an error if no value is found.

Example

data-first

import { Map } from "@monstermann/map";

Map.findOrThrow(
    new Map([
        ["a", 1],
        ["b", 2],
        ["c", 3],
    ]),
    (value) => value > 2,
); // 3

data-last

import { Map } from "@monstermann/map";

pipe(
    new Map([
        ["a", 1],
        ["b", 2],
        ["c", 3],
    ]),
    Map.findOrThrow((value) => value > 2),
); // 3