arrow-core-data / arrow.core / Ior / mapLeft
mapLeft
inline fun <C> mapLeft(fa: (A) -> C): Ior<C, B>
The given function is applied if this is a Left or Both to A.
Example:
Ior.Right(12).map { "flower" } // Result: Right(12)
Ior.Left(12).map { "flower" } // Result: Left("power")
Ior.Both(12, "power").map { "flower $it" } // Result: Both("flower 12", "power")