OptionOps

Value Members

1. final def !=(arg0: Any): Boolean

   

   Definition Classes

   Any

2. final def ##(): Int

   

   Definition Classes

   Any

3. final def ==(arg0: Any): Boolean

   

   Definition Classes

   Any

4. final def asInstanceOf[T0]: T0

   

   Definition Classes

   Any

5. def getClass(): Class[_ <: AnyVal]

   

   Definition Classes

   AnyVal → Any

6. final def isInstanceOf[T0]: Boolean

   

   Definition Classes

   Any

7. val oa: Option[A]

   

8. def orEmpty(implicit A: Monoid[A]): A

   

   If the Option is a Some, return its value.

   If the Option is a Some, return its value. If the Option is None, return the empty value for Monoid[A].

   Example:

   scala> import cats.syntax.option._
   scala> import cats.std.string._
   
   scala> val someString: Option[String] = Some("hello")
   scala> someString.orEmpty
   res0: String = hello
   
   scala> val noneString: Option[String] = None
   scala> noneString.orEmpty
   res1: String = ""

9. def toInvalid[B](b: ⇒ B): Validated[A, B]

   

   If the Option is a Some, return its value in a cats.data.Validated.Invalid.

   If the Option is a Some, return its value in a cats.data.Validated.Invalid. If the Option is None, return the provided B value in a cats.data.Validated.Valid.

   Example:

   scala> import cats.data.Validated
   scala> import cats.syntax.option._
   
   scala> val error1: Option[String] = Some("error!")
   scala> error1.toInvalid(3)
   res0: Validated[String, Int] = Invalid(error!)
   
   scala> val error2: Option[String] = None
   scala> error2.toInvalid(3)
   res1: Validated[String, Int] = Valid(3)

10. def toInvalidNel[B](b: ⇒ B): ValidatedNel[A, B]

    

    If the Option is a Some, wrap its value in a cats.data.NonEmptyList and return it in a cats.data.Validated.Invalid.

    If the Option is a Some, wrap its value in a cats.data.NonEmptyList and return it in a cats.data.Validated.Invalid. If the Option is None, return the provided B value in a cats.data.Validated.Valid.

    Example:

    scala> import cats.data.ValidatedNel
    scala> import cats.syntax.option._
    
    scala> val error1: Option[String] = Some("error!")
    scala> error1.toInvalidNel(3)
    res0: ValidatedNel[String, Int] = Invalid(OneAnd(error!,List()))
    
    scala> val error2: Option[String] = None
    scala> error2.toInvalidNel(3)
    res1: ValidatedNel[String, Int] = Valid(3)

11. def toLeftXor[B](b: ⇒ B): Xor[A, B]

    

    If the Option is a Some, return its value in a cats.data.Xor.Left.

    If the Option is a Some, return its value in a cats.data.Xor.Left. If the Option is None, return the provided B value in a cats.data.Xor.Right.

    Example:

    scala> import cats.data.Xor
    scala> import cats.syntax.option._
    
    scala> val error1: Option[String] = Some("error!")
    scala> error1.toLeftXor(3)
    res0: String Xor Int = Left(error!)
    
    scala> val error2: Option[String] = None
    scala> error2.toLeftXor(3)
    res1: String Xor Int = Right(3)

12. def toRightXor[B](b: ⇒ B): Xor[B, A]

    

    If the Option is a Some, return its value in a cats.data.Xor.Right.

    If the Option is a Some, return its value in a cats.data.Xor.Right. If the Option is None, return the provided B value in a cats.data.Xor.Left.

    Example:

    scala> import cats.data.Xor
    scala> import cats.syntax.option._
    
    scala> val result1: Option[Int] = Some(3)
    scala> result1.toRightXor("error!")
    res0: String Xor Int = Right(3)
    
    scala> val result2: Option[Int] = None
    scala> result2.toRightXor("error!")
    res1: String Xor Int = Left(error!)

13. def toString(): String

    

    Definition Classes

    Any

14. def toValid[B](b: ⇒ B): Validated[B, A]

    

    If the Option is a Some, return its value in a cats.data.Validated.Valid.

    If the Option is a Some, return its value in a cats.data.Validated.Valid. If the Option is None, return the provided B value in a cats.data.Validated.Invalid.

    Example:

    scala> import cats.data.Validated
    scala> import cats.syntax.option._
    
    scala> val result1: Option[Int] = Some(3)
    scala> result1.toValid("error!")
    res0: Validated[String, Int] = Valid(3)
    
    scala> val result2: Option[Int] = None
    scala> result2.toValid("error!")
    res1: Validated[String, Int] = Invalid(error!)

15. def toValidNel[B](b: ⇒ B): ValidatedNel[B, A]

    

    If the Option is a Some, return its value in a cats.data.Validated.Valid.

    If the Option is a Some, return its value in a cats.data.Validated.Valid. If the Option is None, wrap the provided B value in a cats.data.NonEmptyList and return the result in a cats.data.Validated.Invalid.

    Example:

    scala> import cats.data.ValidatedNel
    scala> import cats.syntax.option._
    
    scala> val result1: Option[Int] = Some(3)
    scala> result1.toValidNel("error!")
    res0: ValidatedNel[String, Int] = Valid(3)
    
    scala> val result2: Option[Int] = None
    scala> result2.toValidNel("error!")
    res1: ValidatedNel[String, Int] = Invalid(OneAnd(error!,List()))