Function map

map<S, T>(f: MapFn<S, T>): Lift<S, T>

map<S extends { [I in string | number | symbol]?: S<S>[I] }, T>(
    src: S,
    mapfn: (x: S[number], ix: number, xs: S) => T,
): [S] extends [T] ? { [K in string | number | symbol]: T } : never

map<S extends { -readonly [K in string | number | symbol]: S<S>[K] }, T>(
    src: S,
    mapfn: (x: S[keyof S], ix: keyof S, xs: S) => T,
): [S] extends [T] ? { [K in string | number | symbol]: T } : never

map<S extends readonly [] | readonly unknown[], T>(
    src: S,
    mapfn: (x: S[number], ix: number, xs: S) => T,
): [S] extends [T] ? { [K in string | number | symbol]: T } : never

map<
    S extends
        Record<keyof S & string, unknown>
        | Record<keyof S & number, unknown>,
    T,
>(
    src: S,
    mapfn: (x: S[keyof S], ix: string, xs: S) => T,
): [S] extends [T] ? { [K in string | number | symbol]: T } : never

map<S extends {}, T>(
    src: S,
    mapfn: (x: S[keyof S], ix: string, xs: S) => T,
): [S] extends [T] ? { [K in string | number | symbol]: T } : never