Function reduce

reduce<T1, T2>():
    | Curried3<
        (acc: T2, val: T1, index?: number, arr?: T1[]) => T2,
        T2,
        T1[],
        T2,
    >
    | Curried3<
        (acc: T2, val: T1, key?: string, obj?: Record<string, T1>) => T2,
        T2,
        Record<string, T1>,
        T2,
    >

reduce<T1, T2>(
    fn: (acc: T2, val: T1, index?: number, arr?: T1[]) => T2,
): Curried2<T2, T1[], T2>

reduce<T1, T2>(
    fn: (acc: T2, val: T1, key?: string, obj?: Record<string, T1>) => T2,
): Curried2<T2, Record<string, T1>, T2>

reduce<T1, T2>(
    fn: (acc: T2, val: T1, index?: number, arr?: T1[]) => T2,
    val: T2,
): Curried1<T1[], T2>

reduce<T1, T2>(
    fn: (acc: T2, val: T1, key?: string, obj?: Record<string, T1>) => T2,
    val: T2,
): Curried1<Record<string, T1>, T2>

reduce<T1, T2>(
    fn: (acc: T2, val: T1, index?: number, arr?: T1[]) => T2,
    val: T2,
    arr: T1[],
): T2

reduce<T1, T2>(
    fn: (acc: T2, val: T1, key?: string, obj?: Record<string, T1>) => T2,
    val: T2,
    obj: Record<string, T1>,
): T2