RandomVar (Choco-4.10.2: an Open-Source Constraint Solver 4.10.2 API)

java.lang.Object
- org.chocosolver.solver.search.strategy.selectors.variables.RandomVar<T>

All Implemented Interfaces:

VariableEvaluator<T>, VariableSelector<T>
```
public class RandomVar<T extends Variable>
extends Object
implements VariableSelector<T>, VariableEvaluator<T>
```
Random variable selector & evaluator to be used with fast restart strategy

Since:

06/04/2019.

Author:

Jean-Guillaume FAGES (cosling)

Constructor Summary

Constructors
Constructor Description

RandomVar(long seed, IntVar[] scope)
Random variable selector & evaluator more efficient with fast restart

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`evaluate(T variable)`	Evaluates the heuristic that is minimized in order to find the best variable
`T`	`getVariable(T[] variables)`	Provides access to the current selected variable among `variables`.

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

- Constructor Detail
  - RandomVar
```
public RandomVar(long seed,
                 IntVar[] scope)
```
    Random variable selector & evaluator more efficient with fast restart
    
    Parameters:
    
    seed - seed for random number generator.
    
    scope - variables to branch on, must not be empty
- Method Detail
  - getVariable
```
public T getVariable(T[] variables)
```
    Description copied from interface: VariableSelector
    
    Provides access to the current selected variable among variables. If there is no variable left, return null.
    
    Specified by:
    
    getVariable in interface VariableSelector<T extends Variable>
    
    Returns:
    
    the current selected variable if any, null otherwise.
  - evaluate
```
public double evaluate(T variable)
```
    Description copied from interface: VariableEvaluator
    
    Evaluates the heuristic that is minimized in order to find the best variable
    
    Specified by:
    
    evaluate in interface VariableEvaluator<T extends Variable>
    
    Parameters:
    
    variable - array of variable
    
    Returns:
    
    the result of the evaluation, to minimize