factory-map/dist/FactoryMap.d.ts

Extension of ECMAScript 6 Map to provide default values where no key exists.

export declare class FactoryMap<K, V> extends Map<K, V> {
    private factory?;
    constructor(iterableOrDefaultValueFactory?: Iterable<[K, V]> | ((k: K) => V), defaultValueFactory?: (k: K) => V);
    get(key: K, defaultValueFactory?: (k: K) => V): V;
    get(key: K, defaultValueFactory?: (k: K) => V | undefined): V | undefined;
}