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object folds

List of predefined Folds

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  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##(): Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. def all[A](f: (A) ⇒ Boolean): FoldId[A, Boolean] { ... /* 2 definitions in type refinement */ }

    returns

    return true if the list is empty or if all elements are true, use a Either state to indicate early failure

  5. def any[A](f: (A) ⇒ Boolean): FoldId[A, Boolean] { ... /* 2 definitions in type refinement */ }

    returns

    return false if the list is empty or if all elements are false, use a Either state to indicate early success

  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def average[A](implicit f: Fractional[A]): Fold[Id, A, A]

    returns

    the average of all elements

  8. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. def const[A, B](b: ⇒ B): Fold[[A]A, A, B] { ... /* 2 definitions in type refinement */ }

    constant fold returning the same value at the end

  10. def count[A]: FoldState[A, Int]

    returns

    fold to count elements

  11. def countLong[A]: FoldState[A, Long]

    returns

    fold to count elements

  12. def countLongOf[A](predicate: (A) ⇒ Boolean): FoldState[A, Long]

    returns

    fold to count elements

  13. def countOf[A](predicate: (A) ⇒ Boolean): FoldState[A, Int]

    returns

    fold to count elements

  14. def countUnique[A]: FoldId[A, Int]

    returns

    fold to count the number of unique elements

  15. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. def equals(arg0: Any): Boolean
    Definition Classes
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  17. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  18. def first[A]: FoldState[A, Option[A]]

    returns

    the first element

  19. def firstN[A](n: Int): FoldId[A, List[A]] { type S = scala.collection.mutable.ListBuffer[A] }

    returns

    the first n elements

  20. def flips[A]: FoldId[A, Int] { type S = Int }

    returns

    the number of times an element changes its value

  21. def flipsLong[A]: FoldId[A, Long] { type S = Long }

    returns

    the number of times an element changes its value

  22. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  23. def gradient[A, V](implicit arg0: Numeric[A], arg1: Numeric[V]): FoldId[(A, V), Double]

    returns

    gradient of a given variable A, compared to another V

  24. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  25. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  26. def last[A]: FoldState[A, Option[A]]

    returns

    the last element

  27. def lastN[A](n: Int): FoldId[A, List[A]] { type S = scala.collection.mutable.ListBuffer[A] }

    returns

    the last n elements

  28. def lift[A, U](f: (A) ⇒ U): Fold[[A]A, A, Option[U]] { ... /* 2 definitions in type refinement */ }

    lift a function to a fold that applies f to the last element

  29. def list[A]: FoldId[A, List[A]]

    returns

    a Fold which simply accumulates elements into a List

  30. def maximum[A](implicit arg0: Ordering[A]): FoldState[A, Option[A]]

    returns

    the minimum element

  31. def mean[N](implicit arg0: Fractional[N]): Fold[Id, N, N] { type S = (N, Int) }

    returns

    the mean of elements

  32. def minimum[A](implicit arg0: Ordering[A]): FoldState[A, Option[A]]

    returns

    the maximum element

  33. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  34. final def notify(): Unit
    Definition Classes
    AnyRef
  35. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  36. def onlineStddev[N](implicit arg0: Fractional[N]): Fold[Id, N, (Int, N, Double)]

    returns

    the number of elements, mean and standard deviation

  37. def onlineUnbiasedVariance[N](implicit arg0: Fractional[N]): Fold[Id, N, (Int, N, N)]

    returns

    the number of elements, mean and unbiased variance

  38. def onlineVariance[N](implicit arg0: Fractional[N]): Fold[Id, N, (Int, N, N)]

    returns

    the number of elements, mean and variance

  39. def onlineVariation[N](implicit arg0: Fractional[N]): FoldId[N, (Int, N, N)]

    returns

    the number of elements, mean and variation

  40. def plus[N](implicit arg0: Numeric[N]): FoldState[N, N]

    returns

    a plus fold from a Num

  41. def plusBy[A, N](f: (A) ⇒ N)(implicit arg0: Numeric[N]): Fold[Id, A, N] { type S = N }

    returns

    a plus fold from a mapping to a Num

  42. def proportion[A](predicate: (A) ⇒ Boolean): Fold[Id, A, Double]

    returns

    the proportion of elements satisfying a given predicate

  43. def randomDouble[A]: FoldId[A, Option[Double]] { ... /* 2 definitions in type refinement */ }

    a fold where the current state is a random Double

  44. def randomDoubleWithSeed[A](seed: Long): FoldId[A, Option[Double]] { ... /* 2 definitions in type refinement */ }

    a fold where the current state is a random Double

  45. def randomInt[A]: FoldId[A, Option[Int]] { ... /* 2 definitions in type refinement */ }

    a fold where the current state is a random Int

  46. def randomIntWithSeed[A](seed: Long): FoldId[A, Option[Int]] { ... /* 2 definitions in type refinement */ }

    a fold where the current state is a random Int

  47. def randomWithGeneratorAndFunction[A, R](random: Random, f: (Random) ⇒ R): FoldId[A, Option[R]] { ... /* 2 definitions in type refinement */ }

    create a fold for a mutable Random object

  48. def reservoirSampling[A]: FoldId[A, Option[A]] { ... /* 2 definitions in type refinement */ }

    return an arbitrary streamed element so that each element has the same probability be chosen

  49. def stddev[N](implicit arg0: Fractional[N]): Fold[Id, N, Double]

    returns

    the number of elements, mean and standard deviation

  50. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  51. def times[N](implicit arg0: Numeric[N]): FoldState[N, N]

    returns

    a times fold from a Num

  52. def timesBy[A, N](f: (A) ⇒ N)(implicit arg0: Numeric[N]): Fold[Id, A, N] { type S = N }

    returns

    a times fold from a mapping to a Num

  53. def toString(): String
    Definition Classes
    AnyRef → Any
  54. final def wait(): Unit
    Definition Classes
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    Annotations
    @throws( ... )
  55. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  56. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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