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
boolean containsKey( Algebraic key )
boolean containsValue( Algebraic value )
key
-
index to check
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.
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
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
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