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## weka.core.neighboursearch.covertrees
Class Stack<T>

    java.lang.Object
      weka.core.neighboursearch.covertrees.Stack<T>

Type Parameters:
  `T` - The type of elements to be stored in the stack.

All Implemented Interfaces:
  java.io.Serializable, RevisionHandler

    public class Stack<T>

extends java.lang.Object
implements java.io.Serializable, RevisionHandler

Class implementing a stack.

Version:
  $Revision: 1.3 $
Author:
  Alina Beygelzimer (original C++ code), Sham Kakade (original C++ code), John Langford (original C++ code), Ashraf M. Kibriya (amk14[at-the-rate]cs[dot]waikato[dot]ac[dot]nz) (Java port)
See Also:
  Serialized Form

Field Summary
`java.util.ArrayList<T>` | `elements` The elements inside the stack.
`int` | `length` The number of elements in the stack.

Constructor Summary
`Stack()` Constructor.
`Stack(int capacity)` Constructor.

Method Summary
`void` | `addAll(java.util.Collection c)` Adds all the given elements in the stack.
`void` | `clear()` Removes all the elements from the stack.
`T` | `element(int i)` Returns the ith element in the stack.
`java.lang.String` | `getRevision()` Returns the revision string.
`T` | `last()` Returns the last element in the stack.
`T` | `pop()` Pops (removes) the first (last added) element in the stack.
`void` | `push(Stack<T> v, T new_ele)` Pushes the given element onto the given stack.
`void` | `push(T new_ele)` Pushes the given element to the stack.
`void` | `replaceAllBy(Stack<T> s)` Replace all elements in the stack with the elements of another given stack.
`void` | `set(int i, T e)` Sets the ith element in the stack.
`java.util.List` | `subList(int beginIdx, int uptoLength)` Returns a sublist of the elements in the stack.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### length

    public int length

  The number of elements in the stack.

### elements

    public java.util.ArrayList<T> elements

  The elements inside the stack.

Constructor Detail

### Stack

    public Stack()

  Constructor.

### Stack

    public Stack(int capacity)

  Constructor.

  Parameters:
    `capacity` - The initial capacity of the stack.

Method Detail

### last

    public T last()

  Returns the last element in the stack.

  Returns:
    The last element.

### element

    public T element(int i)

  Returns the ith element in the stack.

  Parameters:
    `i` - The index of the element to return.
  Returns:
    The ith element.

### set

    public void set(int i,
                    T e)

  Sets the ith element in the stack.

  Parameters:
    `i` - The index at which the element is to be inserted.
    `e` - The element to insert.

### subList

    public java.util.List subList(int beginIdx,
                                  int uptoLength)

  Returns a sublist of the elements in the stack.

  Parameters:
    `beginIdx` - The start index of the sublist.
    `uptoLength` - The length of the sublist.
  Returns:
    The sublist starting from beginIdx and of length uptoLength.

### clear

    public void clear()

  Removes all the elements from the stack.

### addAll

    public void addAll(java.util.Collection c)

  Adds all the given elements in the stack.

  Parameters:
    `c` - The collection of elements to add in the stack.

### replaceAllBy

    public void replaceAllBy(Stack<T> s)

  Replace all elements in the stack with the elements of another given stack. It first removes all the elements currently in the stack, and then adds all the elements of the provided stack.

  Parameters:
    `s` - The stack whose elements should be put in this stack.

### pop

    public T pop()

  Pops (removes) the first (last added) element in the stack.

  Returns:
    The poped element.

### push

    public void push(T new_ele)

  Pushes the given element to the stack.

  Parameters:
    `new_ele` - The element to be pushed to the stack.

### push

    public void push(Stack<T> v,
                     T new_ele)

  Pushes the given element onto the given stack.

  Parameters:
    `v` - The stack onto push the element.
    `new_ele` - The element to push.

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

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