Object

hedgehog.core

Shrink

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object Shrink extends XCompat

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

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  2. final def ##(): Int

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

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  4. val StreamOrLazyList: Stream.type

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  5. final def asInstanceOf[T0]: T0

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  6. def clone(): AnyRef

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  7. def consNub[A](x: A, ys0: List[A]): List[A]

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    Cons an element on to the front of a list unless it is already there.

  8. final def eq(arg0: AnyRef): Boolean

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]

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  12. def halves[A](a: A)(implicit I: Integral[A]): List[A]

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    Produce a list containing the progressive halving of an integral.

    Produce a list containing the progressive halving of an integral.

    scala> halves(15)
    List(15, 7, 3, 1)
    
    scala> halves(100)
    List(100, 50, 25, 12, 6, 3, 1)
    
    scala> halves(-26)
    List(-26, -13, -6, -3, -1)
  13. def hashCode(): Int

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  14. final def isInstanceOf[T0]: Boolean

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  15. def list[A](xs: List[A]): List[List[A]]

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    Shrink a list by edging towards the empty list.

    Shrink a list by edging towards the empty list.

    scala> list(List(1, 2, 3))
    List(List(), List(2, 3), List(1, 3), List(1, 2))
    
    >>> list("abcd".toList)
    List("", "cd", "ab", "bcd", "acd", "abd", "abc")

    Note we always try the empty list first, as that is the optimal shrink.

  16. final def ne(arg0: AnyRef): Boolean

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  17. final def notify(): Unit

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  18. final def notifyAll(): Unit

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  19. def removes[A](k0: Int, xs0: List[A]): List[List[A]]

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    Produce all permutations of removing 'k' elements from a list.

    Produce all permutations of removing 'k' elements from a list.

    scala> removes(2, "abcdef".toList)
    List("cdef", "abef", "abcd")
  20. final def synchronized[T0](arg0: ⇒ T0): T0

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  21. def toString(): String

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  22. def towards[A](destination: A, x: A)(implicit I: Integral[A]): List[A]

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    Shrink an integral number by edging towards a destination.

    Shrink an integral number by edging towards a destination.

    scala> towards(0, 100)
    List(0, 50, 75, 88, 94, 97, 99)
    
    scala> towards(500, 1000)
    List(500, 750, 875, 938, 969, 985, 993, 997, 999)
    
    scala> towards(-50,  -26)
    List(-50, -38, -32, -29, -27)

    Note we always try the destination first, as that is the optimal shrink.

  23. def towardsFloat[A](destination: Double, x: Double): List[Double]

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    Shrink a floating-point number by edging towards a destination.

    Shrink a floating-point number by edging towards a destination.

    scala> towards(0.0, 100)
    List(0.0, 50.0, 75.0, 87.5, 93.75, 96.875, 98.4375...)
    
    scala> towards(1.0, 0.5)
    List(1.0, 0.75, 0.625, 0.5625, 0.53125, 0.515625, 0.5078125...)

    Note we always try the destination first, as that is the optimal shrink.

  24. final def wait(): Unit

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  25. final def wait(arg0: Long, arg1: Int): Unit

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  26. final def wait(arg0: Long): Unit

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Inherited from XCompat

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