Algebraic.dagEquals
test the expressions represented by two Algebraics for equality
Calling Sequence
Parameters
Description
Examples
boolean dagEquals( Algebraic algeb ) throws MapleException
algeb
-
Algebraic to compare against
The dagEquals function compares the expression represented by the current Algebraic object with the expression represented by algeb. If the expressions are the same, then true is returned, otherwise false is returned.
If the current Algebraic object is not in its unique representation (see unique), then the dagEquals function returns false, even if the expressions are the same.
import com.maplesoft.openmaple.*;
import com.maplesoft.externalcall.MapleException;
class Example
{
public static void main( String notused[] ) throws MapleException
String[] mapleArgs = { "java" };
Engine kernel = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null );
Algebraic a1, a2, a3;
a1 = kernel.evaluate( "1:" );
a2 = kernel.evaluate( "2:" );
a3 = kernel.evaluate( "1:" );
if ( a1 == a2 || a2 == a3 || a1 == a3 )
System.out.println( "equal objects" );
}
else
System.out.println( "all java object are unequal" );
if ( a1.dagEquals( a2 ) || a2.dagEquals( a3 ) )
System.out.println( "equal dags" );
System.out.println( "the dag for 1 not equal to the dag for 2" );
if ( ! a1.dagEquals( a3 ) )
System.out.println( "unequal dags" );
Executing this code should produce the following output.
all java object are unequal
dag for 1 not equal to the dag for 2
equal dags
See Also
ExternalCalling/Java/MapleException
OpenMaple
OpenMaple/Java/Algebraic
OpenMaple/Java/Algebraic/unique
OpenMaple/Java/API
OpenMaple/Java/Engine/evaluate
OpenMaple/Java/memory
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