Packages

class RandomSelector extends NumberSelector

Get a pseudorandom number from a pool of numbers. The contained logic is similar to RandomSequenceSelector. It is not reliant of a shrinking pool that composes into some sequence of all the numbers, however; the numbers are re-introduced to the selection as long as the pool is used. This allows for the sequence to contain repeat numbers far before ever visiting all of the numbers once.

During the selection process:
The index is the position from where the selection begins, and the end of the Array is where the selection ends. Once a position between those two indices is selected, that number is extracted. The number at the start position is swapped into the position where the selection number was extracted. The start position is then set to an invalid number, and the start index is advanced. Repeat next request.

During the return process:
The returned number is added to the input Array at the position just before the current selection position. The selection index is then reversedback to re-include the returned number. The normal return index is not used in this algorithm.

Source
RandomSelector.scala
See also

RandomSequenceSelector

Linear Supertypes
NumberSelector, AnyRef, Any
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  1. RandomSelector
  2. NumberSelector
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Visibility
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  2. Protected

Instance Constructors

  1. new RandomSelector()

Value Members

  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
  4. def Format(ary: Array[Int]): Unit

    Accept the indexing pool from which numbers are selected and returned.

    Accept the indexing pool from which numbers are selected and returned. Correct its format to suit the current NumberSelector algorithms.

    Moving all of the invalid negative-ones (-1) to the left of the current valid indices works for most selectors. The selectionIndex is set to the first valid number available from the left. The ret index is set to index zero.

    ary

    the Array of Int numbers

    Definition Classes
    NumberSelector
  5. def Get(ary: Array[Int]): Int

    Accept a provided pool and select the next number.

    ...

    Accept a provided pool and select the next number.

    ...

    ary

    the Array of Int numbers from which to draw a new number

    returns

    an Int number

    Definition Classes
    RandomSelector → NumberSelector
  6. def Return(number: Int, ary: Array[Int]): Boolean

    Give a number back to a specific collection following the principles of this selector.

    The number is always returned to a "used" index position near the front of the array.

    Give a number back to a specific collection following the principles of this selector.

    The number is always returned to a "used" index position near the front of the array. It locates this position by incrementally traversing the Array behind the position used in Get. Asides from selection, a disorderly reinsertion of numbers back into the pool is also a source of randomness.

    number

    the number to be returned

    ary

    the Array of Int numbers to which the number is to be returned

    returns

    true, if this return was successful; false, otherwise

    Definition Classes
    RandomSelector → NumberSelector
  7. def ReturnIndex: Int
    Definition Classes
    NumberSelector
  8. def SelectionIndex: Int
    Definition Classes
    NumberSelector
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  11. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  13. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  14. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  19. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. var ret: Int

    The index for the selector when performing a number return action, then modified for the "next" index.

    The index for the selector when performing a number return action, then modified for the "next" index.

    Attributes
    protected
    Definition Classes
    NumberSelector
  21. var selectionIndex: Int

    The index for the selector when performing a number selection action, then modified to the "next" index.

    The index for the selector when performing a number selection action, then modified to the "next" index.

    Attributes
    protected
    Definition Classes
    NumberSelector
  22. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  23. def toString(): String
    Definition Classes
    AnyRef → Any
  24. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  25. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  26. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from NumberSelector

Inherited from AnyRef

Inherited from Any

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