containsKey - Maple Help
For the best experience, we recommend viewing online help using Google Chrome or Microsoft Edge.
Our website is currently undergoing maintenance, which may result in occasional errors while browsing. We apologize for any inconvenience this may cause and are working swiftly to restore full functionality. Thank you for your patience.

Online Help

All Products    Maple    MapleSim


Table.containsKey

check if a key is associated with an element in the Table

Table.containsValue

check if a value is associated with an element in the Table

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

boolean containsKey( Algebraic key )

boolean containsValue( Algebraic value )

Parameters

key

-

index to check

Description

• 

The containsKey function returns true if the Algebraic object key is associated with an element in the Table.  If key is not used, false is returned.

• 

The containsValue function returns true if the Algebraic object value is associated with a value (entry) in the Table.  Otherwise false is returned.

• 

The containsKey function is identical to has except that it does not throw a MapleException. Similarly, containsValue function is identical to member except that it does not throw a MapleException.

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 );

        Table t = (Table)engine.evaluate( "table([1=100,2=200,3=300,4=400]):" );

        System.out.println( t.containsKey( engine.newNumeric( 1 ) ) );

        System.out.println( t.containsKey( engine.newNumeric( 2 ) ) );

        System.out.println( t.containsKey( engine.newNumeric( 5 ) ) );

        System.out.println( t.containsKey( engine.newNumeric( 6 ) ) );

        System.out.println( t.containsValue( engine.newNumeric( 100 ) ) );

        System.out.println( t.containsValue( engine.newNumeric( 200 ) ) );

        System.out.println( t.containsValue( engine.newNumeric( 500 ) ) );

        System.out.println( t.containsValue( engine.newNumeric( 600 ) ) );

    }

}

Executing this code produces the following output.

true

true

false

false

true

true

false

false

See Also

ExternalCalling/Java/MapleException

OpenMaple

OpenMaple/Java/Algebraic

OpenMaple/Java/API

OpenMaple/Java/Table

OpenMaple/Java/Table/assign

OpenMaple/Java/Table/remove

OpenMaple/Java/Table/select

 


Download Help Document