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List.select - return an element stored within a list
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Calling Sequence
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Algebraic select( int i ) 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 return
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Description
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•
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The select function returns the Algebraic object stored in index i of the List.
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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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int i;
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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( "[seq( (2^(i)), i=1..10 )]:" );
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for ( i = 1; i <= 10; i++ )
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{
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System.out.println( l.select(i) );
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}
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try
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{
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l.select(11);
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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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try
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{
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l.select(0);
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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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}
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}
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Executing this code produces the following output.
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2
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4
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8
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16
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32
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64
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128
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256
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512
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1024
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Error, bad index, 11, into list
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Error, bad index, 0, into list
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Download Help Document
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