TypeScript convert array to dictionary

convert_array_to_dictionary.ts

    static toDictionary<TItem>(
        array: TItem[],
        getKey: (item: TItem) => number): { [id: number]: TItem };
    static toDictionary<TItem, TValue>(
        array: TItem[],
        getKey: (item: TItem) => number,
        getValue: (item: TItem) => TValue): { [id: number]: TValue };
    static toDictionary<TItem>(
        array: TItem[],
        getKey: (item: TItem) => string): { [id: string]: TItem };
    static toDictionary<TItem, TValue>(
        array: TItem[],
        getKey: (item: TItem) => string,
        getValue: (item: TItem) => TValue): { [id: string]: TValue };
    static toDictionary<TItem>(
        array: TItem[],
        getKey: (item: TItem) => number | string,
        getValue?: (item: TItem) => any): any { // eslint-disable-line @typescript-eslint/no-explicit-any

        const result = {} as any; // eslint-disable-line @typescript-eslint/no-explicit-any
        if (array) {
            if (getValue) {
                array.forEach(_ => result[getKey(_)] = getValue(_));
            }
            else {
                array.forEach(_ => result[getKey(_)] = _);
            }
        }
        return result;
    }