Method map

packages/effect-app/src/builtin.ts:30–30

(
      callbackfn: (value: T, index: number, array: T[]) => U,
      thisArg?: any
    )

    // foreign code like `(readonly A[] | readonly B[]).map(...)`. A single
    // conditional-return signature refines NonEmpty without a `this` param.
    map<U>(
      callbackfn: (value: T, index: number, array: T[]) => U,
      thisArg?: any
    ): this extends NonEmptyArray<any> ? NonEmptyArray<U> : U[]