Variable lazyMapConst

Type declaration

• • <TMap extends Map<any, any>>(
        map: TMap,
        key: Parameters<TMap["get"]>["0"],
        valueProvider: Provider<Exclude<ReturnType<TMap["get"]>, undefined>>,
        retrieveAction?: (
            value: Exclude<ReturnType<TMap["get"]>, undefined>,
        ) => void,
    ): Exclude<ReturnType<TMap["get"]>, undefined>

  • Get a TValue from the map, and add it first if it doesn't already exist in the map.

    Type Parameters

    • TMap extends Map<any, any>

    Parameters

    • map: TMap

      The map containing values.
    • key: Parameters<TMap["get"]>["0"]

      The key to use when retrieving a value.
    • valueProvider: Provider<Exclude<ReturnType<TMap["get"]>, undefined>>

      The creator function or value to use when the key does not already exist in the map.
    • OptionalretrieveAction: (value: Exclude<ReturnType<TMap["get"]>, undefined>) => void

      An optional action to perform on the value when it already exists in the map.

    Returns Exclude<ReturnType<TMap["get"]>, undefined>

• createMap: typeof createMap

• createSet: typeof createSet

• createWeakMap: typeof createWeakMap

• createWeakSet: typeof createWeakSet