mapWithIndexIn (method)

mapWithIndexIn

• mapWithIndexIn<U, R>(this, f): Opt<readonly R[]>

• Maps over an array inside the Opt with index.

  Type Parameters

  • U

  • R

  Parameters

  • this: Some<readonly U[]>

  • f: ((x, i) => R)

    • • (x, i): R

      • Parameters

        • x: U

        • i: number

        Returns R

  Returns Opt<readonly R[]>

  Example

  opt(['a', 'b']).mapWithIndexIn((x, i) => x + i) // Some(['a0', 'b1'])
  none.mapWithIndexIn((x, i) => x + i) // None