t

Stream.Flow._extend._map

trait _map[A] extends Shared[A]

Stream Conversion Interface

Conversion changes elements type, but element count always stays the same

Self Type
Stream.Flow[A]
Ordering
  1. Alphabetic
Inherited
  1. Flow._extend._map
  2. Flow._extend.Z.Shared
  3. scala.AnyRef
  4. scala.Any
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Visibility
  1. Public
  2. All

Method

  1. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  2. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  3. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  4. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  6. abstract def flatMap[B](f: Mapping[A, ~[B]])(implicit arg0: Ilk[B]): Flow[B]

    Map multiplier

    Map multiplier

    For every existing element, a mapped stream of elements is inserted into the pipeline

    Note. The mapping can return an empty stream, in which case total number of elements might even be reduced

    f

    function to provide a stream of elements for each existing element

    Definition Classes
    _map
    Example:
    1. ~.*(1, 2, 3).flatMap(i => ~.*(i * 10, i * 100, i * 1000)).lp
      
      // Output
      ~(10, 100, 1000, 20, 200, 2000, 30, 300, 3000)
  7. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  8. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  9. def letLookup[B](f: PartialFunction[A, B])(implicit arg0: Ilk[B]): Flow[B]

    Filter and converter

    Filter and converter

    Only lets elements for which given PartialFinction is defined

    The elements are converted to the new type

    def all = ~[Any] + "ABC" + 1 + 22.0 + "DE" + 333F + "F"
    
    all.letLookup({ case s: String if (s.length > 1) => s }).lp
    
    // Output
    ~(ABC, DE)
    Definition Classes
    Shared
    Note

    'letLookup' always requires double evaluation for each element, so 'letMap' is preferred in many cases

  10. def letMap[B](f: Mapping[A, Opt[B]])(implicit arg0: Ilk[B]): Flow[B]

    Filter and converter

    Filter and converter

    Only lets elements for which given function returns non empty Opt

    The elements are converted to the new type

    def all = "ABC" ~+ "1" + "22" + "D" + "333" + "E"
    
    all.letMap(v => if (v.length < 2) \/ else v).lp // Prints: ~(ABC, 22, 333)
    
    all.letMap({
      case s if (s.length >= 2) => s
      case _                    => \/
    }).lp                                           // Prints: ~(ABC, 22, 333)
    
    all.letMap(_.toIntOut.valueOpt).lp              // Prints: ~(1, 22, 333)

    Note: 'letMap' is a better alternative to letLookup with PartialFunction, because it is evaluated just once for each element

    Definition Classes
    Shared
  11. def letType[B](implicit t: ClassTag[B]): Flow[B]

    Filter and type converter

    Filter and type converter

    Only lets elements, which are instances of the given type

    Note, the result is mapped to the specified type

    def all = ~[Any] + "1" + 2 + 3.0 + 4l + "5"
    
    all.lp                  // Prints ~(1, 2, 3.0, 4, 5)
    
    all.letType[String].lp  // Prints ~(1, 5)
    Definition Classes
    Shared
  12. abstract def map[B](f: Mapping[A, B])(implicit arg0: Ilk[B]): Flow[B]

    Element conversion

    Element conversion

    Converts every element in the pipeline with given function

    (1 <> 5).all.map( _ / 2.0).lp
    
    // Output
    ~(0.5, 1.0, 1.5, 2.0, 2.5)
    Definition Classes
    _map
  13. def mapType[B]: Flow[B]

    Element cast

    Element cast

    Casts the pipeline elements into the type specified

    def all: ~[Any] = 1 ~+ 2 + 3
    
    all.mapType[Int].lp // Prints: ~(1, 2, 3)
    Definition Classes
    _map
    Note

    If there is a problem for element casting, it will come up later during pumping action

  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  17. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  18. def toString(): String
    Definition Classes
    AnyRef → Any
  19. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Operator

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
Linear Supertypes
Shared[A], AnyRef, Any
Source: _map.scala