Set.select - Maple Programming Help

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Set.select

return an element stored within a set

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

Algebraic select( int i ) throws MapleException

Parameters

i

-

index of the entry to return

Description

• 

The select function returns the Algebraic object stored in index i of the Set.

• 

Valid values of i are 1..n where n is the size of the set.  The size can be obtained by calling numElements.

Examples

import com.maplesoft.openmaple.*;

import com.maplesoft.externalcall.MapleException;

class Example

{

    public static void main( String notused[] ) throws MapleException

    {

        String[] mapleArgs = { "java" };

        Engine engine = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null );

        int i;

        Set s = (Set)engine.evaluate( "{seq( (2^(i)), i=1..10 )}:" );

        for ( i = 1; i <= 10; i++ )

        {

            System.out.println( l.select(i) );

        }

        try

        {

            s.select(11);

        }

        catch ( MapleException me )

        {

            System.out.println( me.getMessage() );

        }

        try

        {

            s.select(0);

        }

        catch ( MapleException me )

        {

            System.out.println( me.getMessage() );

        }

    }

}

Executing this code produces the following output.

2

4

8

16

32

64

128

256

512

1024

Error, bad index, 11, into set

Error, bad index, 0, into set

See Also

ExternalCalling/Java/MapleException

OpenMaple

OpenMaple/Java/Algebraic

OpenMaple/Java/API

OpenMaple/Java/Set

OpenMaple/Java/Set/containsAll

OpenMaple/Java/Set/iterator

OpenMaple/Java/Set/toArray