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F[Option[A]]

Module​

"io.kevinlee" %% "extras-cats" % "0.56.0"

or for Scala.js:

"io.kevinlee" %%% "extras-cats" % "0.56.0"

Extension Methods for F[Option[A]]​

import extras.cats.syntax.all._

Change Value​

innerMap​

val foa: F[Option[A]] = ...
foa.innerMap(A => B) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerMap(_ + 999)
  .unsafeRunSync()
// res1: Option[Int] = Some(value = 1000)

innerFlatMap​

val foa: F[Option[A]] = ...
foa.innerFlatMap(A => Option[B]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerFlatMap(a => (a + 999).some)
  .unsafeRunSync()
// res3: Option[Int] = Some(value = 1000)

innerFlatMapF​

val foa: F[Option[A]] = ...
foa.innerFlatMapF(A => F[Option[B]]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerFlatMapF(a => IO.pure((a + 999).some))
  .unsafeRunSync()
// res5: Option[Int] = Some(value = 1000)

Get Value​

innerGetOrElse​

val foa: F[Option[A]] = ...
foa.innerGetOrElse[B >: A](=> B) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(999.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 999))
foa.innerGetOrElse(0)
  .unsafeRunSync()
// res7: Int = 999

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)
foa2.innerGetOrElse(0)
  .unsafeRunSync()
// res8: Int = 0

innerGetOrElseF​

val foa: F[Option[A]] = ...
foa.innerGetOrElseF[B >: A](=> F[B]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(999.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 999))
foa.innerGetOrElseF(IO.pure(0))
  .unsafeRunSync()
// res10: Int = 999

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)
foa2.innerGetOrElseF(IO.pure(0))
  .unsafeRunSync()
// res11: Int = 0

innerFold​

val foa: F[Option[A]] = ...
foa.innerFold[B](=> B)(A => B) // F[B]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))
foa.innerFold(0)(_ + 999)
  .unsafeRunSync()
// res13: Int = 1000

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)
foa2.innerFold(0)(_ + 999)
  .unsafeRunSync()
// res14: Int = 0

innerFoldF​

val foa: F[Option[A]] = ...
foa.innerFoldF[B >: A](=> F[B])(A => F[B]) // F[B]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerFoldF(IO.pure(0))(a => IO.pure(a + 999))
  .unsafeRunSync()
// res16: Int = 1000

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)

foa2.innerFoldF(IO.pure(0))(a => IO.pure(a + 999))
  .unsafeRunSync()
// res17: Int = 0

innerOrElse​

val foa: F[Option[A]] = ...
foa.innerOrElse[B >: A](Option[B]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerOrElse(0.some)
  .unsafeRunSync()
// res19: Option[Int] = Some(value = 1)

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)

foa2.innerOrElse(0.some)
  .unsafeRunSync()
// res20: Option[Int] = Some(value = 0)

innerOrElseF​

val foa: F[Option[A]] = ...
foa.innerOrElse[B >: A](F[Option[B]]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerOrElseF(IO.pure(0.some))
  .unsafeRunSync()
// res22: Option[Int] = Some(value = 1)

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)

foa2.innerOrElseF(IO.pure(0.some))
  .unsafeRunSync()
// res23: Option[Int] = Some(value = 0)

Do​

innerForeach​

val foa: F[Option[A]] = ...
foa.innerForeach(A => Unit) // F[Unit]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))
foa.innerForeach(println)
  .unsafeRunSync()
// 1

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)
foa2.innerForeach(println)
  .unsafeRunSync()

innerForeachF​

val foa: F[Option[A]] = ...
foa.innerForeachF(A => F[Unit]) // F[Unit]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerForeachF(a => IO.delay(println(a)))
  .unsafeRunSync()
// 1

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)

foa2.innerForeachF(a => IO.delay(println(a)))
  .unsafeRunSync()

innerFilter​

val foa: F[Option[A]] = ...
foa.innerFilter(A => Boolean) // F[Option[A]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerFilter(_ > 0)
  .unsafeRunSync()
// res31: Option[Int] = Some(value = 1)

foa.innerFilter(_ > 1)
  .unsafeRunSync()
// res32: Option[Int] = None

innerExists​

val foa: F[Option[A]] = ...
foa.innerExists(A => Boolean) // F[Boolean]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerExists(_ > 0)
  .unsafeRunSync()
// res34: Boolean = true

foa.innerExists(_ > 1)
  .unsafeRunSync()
// res35: Boolean = false

innerContains​

val foa: F[Option[A]] = ...
foa.innerContains(A) // F[Boolean]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerContains(1)
  .unsafeRunSync()
// res37: Boolean = true

foa.innerContains(0)
  .unsafeRunSync()
// res38: Boolean = false

innerForall​

val foa: F[Option[A]] = ...
foa.innerForall(A) // F[Boolean]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerForall(_ > 0)
  .unsafeRunSync()
// res40: Boolean = true

foa.innerForall(_ > 1)
  .unsafeRunSync()
// res41: Boolean = false

val foa2 = IO.pure(none[Int])
// foa2: IO[Option[Int]] = Pure(a = None)

foa2.innerForall(_ > 1)
  .unsafeRunSync()
// res42: Boolean = true

innerCollect​

val foa: F[Option[A]] = ...
foa.innerCollect(PartialFunction[A, B]) // F[Option[B]]

Example​

import cats.syntax.all._
import cats.effect._

import extras.cats.syntax.all._

val foa = IO.pure(1.some)
// foa: IO[Option[Int]] = Pure(a = Some(value = 1))

foa.innerCollect {
  case 1 => 0
  case 2 => 999
}
  .unsafeRunSync()
// res44: Option[Int] = Some(value = 0)

val foa2 = IO.pure(2.some)
// foa2: IO[Option[Int]] = Pure(a = Some(value = 2))

foa2.innerCollect {
  case 1 => 0
  case 2 => 999
}
  .unsafeRunSync()
// res45: Option[Int] = Some(value = 999)

val foa3 = IO.pure(3.some)
// foa3: IO[Option[Int]] = Pure(a = Some(value = 3))

foa3.innerCollect {
  case 1 => 0
  case 2 => 999
}
  .unsafeRunSync()
// res46: Option[Int] = None