http://projecteuler.net/problem=1

#include <stdio .h>
#include <iostream>
 
using namespace std;
 
int main()
{
  int sum = 0;
 
  for(int x = 0; x < 1000; ++x) {
  std::cout << ". ";
  if (x % 3 ==0 || x % 5 == 0) {
    std::cout << x << " ";
    sum += x;
  }
  }
 
  std::cout << "\nSum of numbers which can be divided by 3 and 5 is " << sum << "\n";
  return 0;
};

date crap

How to get the current epoch time in …

Perl time
PHP time()
Ruby Time.now (or Time.new). To display the epoch: Time.now.to_i
Python import time first, then time.time()
Java long epoch = System.currentTimeMillis()/1000;
Microsoft .NET C# epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
VBScript/ASP DateDiff("s", "01/01/1970 00:00:00", Now())
Erlang calendar:datetime_to_gregorian_seconds(calendar:now_to_universal_time( now()))-719528*24*3600.
MySQL SELECT unix_timestamp(now()) More information
PostgreSQL SELECT extract(epoch FROM now());
Oracle PL/SQL SELECT (SYSDATE - TO_DATE('01-01-1970 00:00:00', 'DD-MM-YYYY HH24:MI:SS')) *
24 * 60 * 60 FROM DUAL
SQL Server SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
JavaScript Math.round(new Date().getTime()/1000.0) getTime() returns time in milliseconds.
Unix/Linux date +%s
PowerShell Get-Date -UFormat "%s" Produces: 1279152364.63599
Other OS’s Command line: perl -e "print time" (If Perl is installed on your system)

Convert from human readable date to epoch

Perl Use these Perl Epoch routines
PHP mktime(hour, minute, second, month, day, year) More information
Ruby Time.local(year, month, day, hour, minute, second, usec ) (or Time.gm for GMT/UTC input). To display add .to_i
Python import time first, then int(time.mktime(time.strptime('2000-01-01 12:34:00', '%Y-%m-%d %H:%M:%S'))) - time.timezone
Java long epoch = new java.text.SimpleDateFormat ("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00");
VBScript/ASP DateDiff("s", "01/01/1970 00:00:00", time field) More information
MySQL SELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD
More on using Epoch timestamps with MySQL
PostgreSQL SELECT extract(epoch FROM date('2000-01-01 12:34'));
With timestamp: SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE '2001-02-16 20:38:40-08');
With interval: SELECT EXTRACT(EPOCH FROM INTERVAL '5 days 3 hours');
SQL Server SELECT DATEDIFF(s, '1970-01-01 00:00:00', time field)
JavaScript use the JavaScript Date object
Unix/Linux date +%s -d"Jan 1, 1980 00:00:01" Replace ‘-d’ with ‘-ud’ to input in GMT/UTC time.

Convert from epoch to human readable date

Perl Use these Perl Epoch routines
PHP date(output format, epoch); Output format example: ‘r’ = RFC 2822 date More information
Ruby Time.at(epoch)
Python import time first, then time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.localtime(epoch)) Replace time.localtime with time.gmtime for GMT time. More information
Java String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date (epoch*1000));
VBScript/ASP DateAdd("s", epoch, "01/01/1970 00:00:00") More information
MySQL from_unixtime(epoch, optional output format) The default output format is YYY-MM-DD HH:MM:SS more …
PostgreSQL PostgreSQL version 8.1 and higher: SELECT to_timestamp(epoch); More information Older versions: SELECT TIMESTAMP WITH TIME ZONE 'epoch' + epoch * INTERVAL '1 second';
SQL Server DATEADD(s, epoch, '1970-01-01 00:00:00')
Microsoft Excel =(A1 / 86400) + 25569 Format the result cell for date/time, the result will be in GMT time (A1 is the cell with the epoch number). For other timezones: =((A1 +/- timezone adjustment) / 86400) + 25569.
Crystal Reports DateAdd("s", {EpochTimeStampField}-14400, #1/1/1970 00:00:00#) -14400 used for Eastern Standard Time. See Timezones.
JavaScript use the JavaScript Date object
Unix/Linux date -d @1190000000 Replace 1190000000 with your epoch, needs recent version of ‘date’. Replace ‘-d’ with ‘-ud’ for GMT/UTC time.
PowerShell Function get-epochDate ($epochDate) { [timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($epochDate)) }, then use: get-epochDate 1279152364. Works for Windows PowerShell v1 and v2
Other OS’s Command line: perl -e "print scalar(localtime(epoch))" (If Perl is installed) Replace ‘localtime’ with ‘gmtime’ for GMT/UTC time.

Bibliotheek (6.16)

 
package bibliotheek;
 
import java.util.ArrayList;
 
import bibliotheek.Boek;
 
public class Bibliotheek {
  ArrayList<boek> boekenlijst = new ArrayList</boek><boek>();
 
  public Bibliotheek(){    
  }
 
  public ArrayList<string> geefTitels(){
    ArrayList</string><string> titels = new ArrayList</string><string>();
    for (Boek b: boekenlijst){
      titels.add(b.getTitel());
    }
    return titels;
  }
 
  public String geefAuteur(String titel){
    String auteur = null;
    for (Boek b: boekenlijst){
      if (b.getTitel().equals(titel)) {
        auteur = b.getAuteur();
      }
    }
    return auteur;
  }
 
  public void voegBoekToe(String titel, String auteur){
    Boek nieuwBoek = new Boek(titel, auteur);
    boekenlijst.add(nieuwBoek);
  }
}
</string></boek>

Dobbelsteen in Java (6.5)

package dobbelsteen;
 
import java.util.Random;
 
 
public class Dobbelsteen {
  private int getal = 0;
 
 
  public void Dobbelsteen(){
  }
 
  public int gooi(){
    Random rnd = new Random();
    return (rnd.nextInt(5) + 1);
  }
 
  public void setGetal(int getal){
    this.getal = getal;
  }
 
  public int getGetal(){
    return this.getal;
  }
 
  public static void main(String args[]) {
    Dobbelsteen d = new Dobbelsteen();
    int gegooid = d.gooi();
    d.setGetal(gegooid);
    System.out.println("Je gooide: " + d.getGetal());
  }
}

KnopAanKnopUit

 
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.Rectangle;
 
public class KnoppenFrame extends JFrame {
 
  private static final long serialVersionUID = 1L;
  private JPanel jContentPane = null;
  private JButton knopLinks = null;
  private JButton knopRechts = null;
 
  /**
   * This method initializes knopLinks	
   * 	
   * @return javax.swing.JButton	
   */
  private JButton getKnopLinks() {
    if (knopLinks == null) {
      knopLinks = new JButton();
      knopLinks.setBounds(new Rectangle(29, 30, 108, 124));
      knopLinks.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent e) {
          System.out.println("actionPerformed()"); 
          knopRechts.setVisible(true);
          knopLinks.setVisible(false);
          // TODO Auto-generated Event stub actionPerformed()
        }
      });
    }
    return knopLinks;
  }
 
  /**
   * This method initializes knopRechts	
   * 	
   * @return javax.swing.JButton	
   */
  private JButton getKnopRechts() {
    if (knopRechts == null) {
      knopRechts = new JButton();
      knopRechts.setBounds(new Rectangle(166, 30, 105, 124));
      knopRechts.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent e) {
          System.out.println("actionPerformed()"); 
          knopLinks.setVisible(true);
          knopRechts.setVisible(false);
        }
      });
    }
    return knopRechts;
  }
 
  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
 
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        KnoppenFrame thisClass = new KnoppenFrame();
        thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        thisClass.setVisible(true);
      }
    });
  }
 
  /**
   * This is the default constructor
   */
  public KnoppenFrame() {
    super();
    initialize();
    this.knopRechts.setVisible(false);
  }
 
  /**
   * This method initializes this
   * 
   * @return void
   */
  private void initialize() {
    this.setSize(300, 200);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setContentPane(getJContentPane());
    this.setTitle("KnoppenAanUit");
  }
 
  /**
   * This method initializes jContentPane
   * 
   * @return javax.swing.JPanel
   */
  private JPanel getJContentPane() {
    if (jContentPane == null) {
      jContentPane = new JPanel();
      jContentPane.setLayout(null);
      jContentPane.add(getKnopLinks(), null);
      jContentPane.add(getKnopRechts(), null);
    }
    return jContentPane;
  }
 
}