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List.assign - assign a value to an element of the list
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Calling Sequence
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void assign( int i, Algebraic val ) throws MapleException
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Parameters
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i
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-
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index of the entry to assign
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val
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-
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value to assign to the list
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Description
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The assign function assigns the Algebraic object val into the element of the List indexed by i.
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The assign function can be called only on an List that is not a unique representation. For more information, see unique).
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Valid values of i are  where  is the length of the list. The length can be obtained by calling length.
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Examples
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import com.maplesoft.openmaple.*;
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import com.maplesoft.externalcall.MapleException;
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class Example
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{
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public static void main( String notused[] ) throws MapleException
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{
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String mapleArgs[];
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Engine engine;
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List l;
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mapleArgs = new String[1];
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mapleArgs[0] = "java";
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engine = new Engine( mapleArgs, new EngineCallBacksDefault(),
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null, null );
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l = (List)engine.evaluate( "[1,2,3]:" );
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try
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{
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l.assign( 1, engine.newNumeric( 2.2 ) );
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}
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catch ( MapleException me )
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{
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System.out.println( me.getMessage() );
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}
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l = engine.newList( 3 );
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l.assign( 1, engine.newNumeric( 1 ) );
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l.assign( 2, engine.newNumeric( 2 ) );
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l.assign( 3, engine.newNumeric( 3 ) );
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l = (List)l.unique();
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System.out.println( l );
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}
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}
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Executing this code produces the following output.
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Error, lists from Maple cannot be modified in-place
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[1, 2, 3]
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Download Help Document
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