Expseq.assign
assign a value into an element of the expression sequence
Calling Sequence
Parameters
Description
Examples
void assign( int i, Algebraic val ) throws MapleException
i
-
index of the entry to assign
val
value to assign into the expression sequence
The assign function assigns the Algebraic object val into the element of the Expseq indexed by i.
The assign function can only be called on an Expseq, which is not a unique representation. For more information, see unique.
Valid values of i are 1..n where n is the length of the expression sequence. The length can be obtained by calling numElements.
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 );
Expseq e = (Expseq)engine.evaluate( "1,2,3:" );
try
e.assign( 1, engine.newNumeric( 2.2 ) );
}
catch ( MapleException me )
System.out.println( me.getMessage() );
e = engine.newExpseq( 3 );
e.assign( 1, engine.newNumeric( 1 ) );
e.assign( 2, engine.newNumeric( 2 ) );
e.assign( 3, engine.newNumeric( 3 ) );
e = (Expseq)e.unique();
System.out.println( e );
Executing this code produces the following output.
Error, expression sequences from Maple cannot be modified in-place
[1, 2, 3]
See Also
ExternalCalling/Java/MapleException
OpenMaple
OpenMaple/Java/Algebraic
OpenMaple/Java/API
OpenMaple/Java/Expseq
OpenMaple/Java/Expseq/iterator
OpenMaple/Java/Expseq/select
OpenMaple/Java/Indexable
Download Help Document
