isLeft

@JvmName(name = "_isLeft")

inline fun isLeft(predicate: (A) -> Boolean): Boolean(source)

Returns false if Right or Both, or returns the result of the application of the given predicate to the Left value.

Example:

import arrow.core.Ior

fun main() {
  val right: Ior<Int, Int> = Ior.Right(12)
  right.isLeft { it 10 }   // Result: false
  Ior.Both(12, 7).isLeft { it 10 }    // Result: false
  Ior.Left(12).isLeft { it 10 }      // Result: true
}