@uk/tool/src/arraymap.ts

Uk tools module

export class ArrayMap<TKey, TVal> extends Map<TKey, TVal> {
    find(cb: (val: TVal, key: TKey)=> boolean): TVal | undefined {
        for (const pair of this) {
            if (cb(pair[1], pair[0])) return pair[1];
        }
    }
    filter(cb: (val: TVal, key: TKey)=> boolean): TVal[] {
        const rv = [];
        for (const pair of this) {
            if (cb(pair[1], pair[0])) rv.push(pair[1]);
        }
        return rv;
    }
    map<T>(cb: (val: TVal, key: TKey)=> T): T[] {
        const rv = [];
        for (const pair of this) {
            rv.push(cb(pair[1], pair[0]));
        }
        return rv;
    }
}