List.searchFirst
return first index of element within a list
List.searchLast
return last index of element within a list
Calling Sequence
Description
Examples
int searchFirst( Algebraic expr ) throws MapleException
int searchLast( Algebraic expr ) throws MapleException
The searchFirst function returns the leftmost index of expr in the List, or 0 if expr is not an element of the List.
The searchLast function returns the rightmost index of expr in the List, or 0 if expr is not an element of the List,
The indices returned are one-based; that is, the index of the first element is 1 and the index of the last element equals the result of numElements. See indexOf and lastIndexOf for functions which are equivalent but zero-based.
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( "[1,3,7,3,10]:" );
Numeric three = engine.newNumeric( 3 );
Numeric four = engine.newNumeric( 4 );
System.out.println("Leftmost index of 3: " + searchFirst( three ) );
System.out.println("Rightmost index of 3: " + searchLast( three ) );
System.out.println("Leftmost index of 4: " + searchFirst( four ) );
System.out.println("Rightmost index of 4: " + searchLast( four ) );
}
Executing this code produces the following output.
Leftmost index of 3: 2
Rightmost index of 3: 4
Leftmost index of 4: 0
Rightmost index of 4: 0
See Also
ExternalCalling/Java/MapleException
OpenMaple
OpenMaple/Java/Algebraic
OpenMaple/Java/API
OpenMaple/Java/Indexable
OpenMaple/Java/List
OpenMaple/Java/List/assign
OpenMaple/Java/List/contains
OpenMaple/Java/List/containsAll
OpenMaple/Java/List/indexOf
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