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Algebraic.dagEquals - test the expressions represented by two Algebraics for equality
Calling Sequence
boolean dagEquals( Algebraic algeb ) throws MapleException
Parameters
algeb
-
Algebraic to compare against
Description
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.
Examples
import com.maplesoft.openmaple.*;
import com.maplesoft.externalcall.MapleException;
class Example
{
public static void main( String notused[] ) throws MapleException
String mapleArgs[];
Engine kernel;
Algebraic a1, a2, a3;
mapleArgs = new String[1];
mapleArgs[0] = "java";
kernel = new Engine( mapleArgs, new EngineCallBacksDefault(),
null, null );
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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