Finding Examples

Finding Examples

Finding 1 - Finding a single element, conditional searching, finding consecutive elements.

Finding 2 - Finding objects that match a predicate. 

Finding1 Example Code
// Copyright(c) 1996 ObjectSpace, Inc.

import jgl.*;

/**
 * Finding a single element, conditional searching, finding consecutive elements.
 * 

 * @see jgl.Finding
 * @version 1.1
 * @author ObjectSpace, Inc.
 */

public class Finding1
  {
  public static void main( String[] args )
    {
    Array array = new Array();
    array.add( "cat" );
    array.add( "dog" );
    array.add( "emu" );
    array.add( "dog" );
    array.add( "dog" );
    ArrayIterator i = array.begin();

    while( true )
      {
      i = (ArrayIterator) Finding.find( i, array.end(), "dog" );
      if( i.atEnd() ) // A simpler way of saying: if( i.equals( array.end() ) )...
        break; 
      System.out.println( "iterator found " + i.get() + " at index " + i.index() );
      i.advance();
      }

    int intArray[] = { 3, 6, 2, 1, 8, 9, 4, 5 };
    IntIterator j = (IntIterator) Finding.findIf( IntIterator.begin( intArray ), IntIterator.end( intArray ), new BindSecondPredicate( new GreaterInteger(), new Integer( 7 ) ) );
    System.out.println( "First element > 7 is " + j.get() + " at index " + j.index() );

    DList list = new DList();
    list.add( "cat" );
    list.add( "dog" );
    list.add( "emu" );
    list.add( "emu" );
    list.add( "dog" ); 
    DListIterator k = (DListIterator) Finding.adjacentFind( list, new EqualTo() );
    System.out.println( "First consecutive sequence is of " + k.get() + " at index " + k.index() );
    }
  }


Finding1 Example Output
iterator found dog at index 1
iterator found dog at index 3
iterator found dog at index 4
First element > 7 is 8 at index 4
First consecutive sequence is of emu at index 2


Finding2 Example Code
// Copyright(c) 1996 ObjectSpace, Inc.

import jgl.*;

/**
 * Finding objects that match a predicate.
 * 

 * @see jgl.Finding
 * @version 1.1
 * @author ObjectSpace, Inc.
 */

public class Finding2
  {
  public static void main( String[] args )
    {
    Array array = new Array();
    array.add( "cat" );
    array.add( "monkey" );
    array.add( "lion" );
    array.add( "armadillo" );
    array.add( "zebra" );
    System.out.println( "array = " + array );

    System.out.println( "Array has SOME string > 5 chars  == " 
                        + Finding.some( array, new Finding2UnaryPredicate() ) );
    System.out.println( "Array has EVERY string > 5 chars == " 
                        + Finding.every( array, new Finding2UnaryPredicate() ) );
    System.out.println( "1st Object in array > 5 chars    == " 
                        + Finding.detect( array, new Finding2UnaryPredicate() ) );
    }
  }

class Finding2UnaryPredicate implements UnaryPredicate
  {
  // return true if the length of the toString() is
  // greater than 5.
  public boolean execute( Object object )
    {
    return object.toString().length() > 5;
    }
  }


Finding2 Example Output
array = Array( cat, monkey, lion, armadillo, zebra )
Array has SOME string > 5 chars  == true
Array has EVERY string > 5 chars == false
1st Object in array > 5 chars    == monkey