Applying Examples

Applying Examples

Applying 1 - Applying a unary function to every element of a sequence.

Applying 2 - Applying - inject a container with a given binary function 

Applying1 Example Code
// Copyright(c) 1996 ObjectSpace, Inc.

import jgl.*;

/**
 * Applying a unary function to every element of a sequence.
 * 

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

public class Applying1
  {
  public static void main( String[] args )
    {
    Array array = new Array();
    array.add( "cat" );
    array.add( "dog" );
    array.add( "emu" );
    System.out.println( "array = " + array );

    System.out.println( "Print each element to standard output" );
    Applying.forEach( array.begin(), array.end(), new Print() );

    System.out.println( "Print each element to standard output" );
    Applying.forEach( array, new Print() );
    }
  }

Applying1 Example Output
array = Array( cat, dog, emu )
Print each element to standard output
cat
dog
emu
Print each element to standard output
cat
dog
emu


Applying2 Example Code
// Copyright(c) 1996 ObjectSpace, Inc.

import jgl.*;

/**
 * Applying - inject a container with a given binary function
 * which does a 'reduction' operation.
 * 

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

public class Applying2
  {
  public static void main( String[] args )
    {                                                                   
    Array array = new Array();
    array.add( new Integer( 100 ) );
    array.add( new Integer( 2 ) );
    array.add( new Integer( 71 ) );
    System.out.println( "array = " + array );
    System.out.println( "injecting TimesInteger(initial value==1) = " 
                        + Applying.inject( array.begin(), array.end(), 
                                           new Integer( 1 ), new TimesInteger() ) );
    System.out.println( "injecting PlusInteger(initial value==0) = " 
                        + Applying.inject( array, new Integer( 0 ), new PlusInteger() ) );
    System.out.println( "injecting MinusInteger(initial value==0) = " 
                        + Applying.inject( array, new Integer( 0 ), new MinusInteger() ) );
    System.out.println( "injecting DividesInteger(initial value==1000) = " 
                        + Applying.inject( array, new Integer( 100000 ), new DividesInteger() ) );
    }
  }
Applying2 Example Output
array = Array( 100, 2, 71 )
injecting TimesInteger(initial value==1) = 14200
injecting PlusInteger(initial value==0) = 173
injecting MinusInteger(initial value==0) = -173
injecting DividesInteger(initial value==1000) = 7