IndexSet (org.matheclipse:matheclipse-gpl 3.0.0 API)

java.lang.Object
- de.tilman_neumann.jml.factor.base.matrixSolver.IndexSet

```
public class IndexSet
extends Object
```
BitArray implementation of an IndexSet, realized in long[], used by the Gaussian solver. The xor() operation has complexity O(n), where n is the sum of the size of the two argument arrays. Since here 64 xor's are done at once, this implementation is very fast compared to other algorithms with the same complexity.

Author:

Tilman Neumann

Constructor Summary

Constructors
Constructor Description

IndexSet(int numberOfBits)
Standard constructor, creates an empty bit array capable to hold the given numberOfBits.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(int x)`	Add a single element x to this index set.
`void`	`addXor(IndexSet other)`
`boolean`	`contains(Object o)`
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Integer`	`last()`
`ArrayList<Integer>`	`toList()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - IndexSet
```
public IndexSet(int numberOfBits)
```
    Standard constructor, creates an empty bit array capable to hold the given numberOfBits.
    
    Parameters:
    
    numberOfBits -
- Method Detail
  - add
```
public void add(int x)
```
    Add a single element x to this index set.
    
    Parameters:
    
    x -
  - contains
```
public boolean contains(Object o)
```
  - last
```
public Integer last()
```
  - isEmpty
```
public boolean isEmpty()
```
    Returns:
    
    true if this set is empty
  - addXor
```
public void addXor(IndexSet other)
```
  - toList
```
public ArrayList<Integer> toList()
```
    Returns:
    
    this index set as a list
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object