mapLeft

inline fun <C> mapLeft(fa: (A) -> C): Ior<C, B>(source)

The given function is applied if this is a Left or Both to A.

Example:

import arrow.core.Ior

fun main() {
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")
}