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