Get lastest record of workitem

SQL Server

-- get lastest record of every instance

SELECT * FROM [HISTORY] H
WHERE [CREATEDTIME]  = 
    (
        SELECT MAX([CREATEDTIME]) FROM [HISTORY] M 
        WHERE M.[PROCESSINSTANCEID] = H.[PROCESSINSTANCEID] AND M.[EVENTTYPE] = H.[EVENTTYPE]
    )
ORDER BY [PROCESSINSTANCEID]

Extension method

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine(StringExtension.UrlEncodeMethod("中文"));
        Console.WriteLine("中文".UrlEncode());
        Console.Read();
    }
}


static class StringExtension
{
    public static string UrlEncodeMethod(string s)
    {
        return HttpUtility.UrlEncode(s);
    }

    public static string UrlEncode(this string s)
    {
        return HttpUtility.UrlEncode(s);
    }
}

Reference to container in actionlistener

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class TestAction extends JFrame {

    public TestAction() {
        this.setTitle("Test Click action");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(300, 300);
        this.setLocation(200, 200);

        JButton button = new JButton("click me");
        button.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(TestAction.this, TestAction.this.getTitle());
            }

        });
        this.getContentPane().add(button);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        new TestAction();
    }
}

review : delegate in c#

I think I've got old because while using delegate, I couldn't remember it's usage. So I think it's a good idea to take a review and memo it here.

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.Linq;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.Activities.Rules;

namespace wfConsole
{
    delegate void PrintLine();
    delegate void PrintContent(string s, int count);

    public sealed partial class Workflow1 : SequentialWorkflowActivity
    {
        public Workflow1()
        {
            InitializeComponent();
        }

        private void ReviewDelegate_ExecuteCode(object sender, EventArgs e)
        {
            // 委派 C# 1.0
            PrintLine pl = new PrintLine(this.WriteLine);
            PrintContent pc = new PrintContent(this.WriteContent);
            pl.Invoke();
            pc.Invoke("C# 1.0", 5);

            // 委派 C# 2.0
            PrintLine pl2 = delegate()
            {
                Console.WriteLine("********************");
            };
            PrintContent pc2 = delegate(string s, int count)
            {
                for (int i = 0; i < count; i++)
                {
                    Console.Write("{0:00} ", i + 1);
                    Console.WriteLine(s);
                }
            };
            pl2.Invoke();
            pc2.Invoke("C# 2.0", 5);

            // 委派 C# 3.0
            PrintLine pl3 = () =>
            {
                Console.WriteLine("----------------------");
            };
            PrintContent pc3 = (string s, int count) =>
            {
                for (int i = 0; i < count; i++)
                {
                    Console.Write("{0:00} ", i + 1);
                    Console.WriteLine(s);
                }
            };
            pl3.Invoke();
            pc3.Invoke("C# 3.0", 5);

            Console.Read();
        }

        private void WriteLine()
        {
            Console.WriteLine("=========================");
        }

        private void WriteContent(string s, int count)
        {
            for (int i = 0; i < count; i++)
            {
                Console.Write("{0:00} ", i + 1);
                Console.WriteLine(s);
            }
        }
    }

}

Enable/disable network adapter

windows:

netsh interface set interface <interface name> DISABLED
netsh interface set interface <interface name> ENABLED

linux:

ifconfig eth1 down
ifconfig eth1 up

SVN Version control

Visual SVN
http://www.visualsvn.com/
TortoiseSVN 
http://tortoisesvn.net/
AnkhSVN 
http://ankhsvn.open.collab.net/

AnkhSVN で外部 diff

ツール >> AnkhSVN >> Edit the AnkhSVN configuration

DiffExePath
"C:\Program Files\WinMerge\WinMergeU.exe" -e -x -ub "%base" "%mine"
MergeExePath
"C:\Program Files\TortoiseSVN\bin\TortoiseMerge.exe" /base:"%base" /theirs:"%theirs" /mine:"%mine" /merged:"%merged"

refernect : http://d.hatena.ne.jp/MillyC/20071010/1192006340

backup/restore

從原有的Subversion (svn)備份出來，並還原到新的Subversion Server 上。

備份Subversion 的repository 並將備份檔傳到要還原的機器上。

1. svnadmin dump /path/to/project/ >/tmp/project.dump

2. scp -rp /tmp/project.dump user@192.168.1.1:/tmp/

還原

1. mkdir -p /path/to

2. svnadmin create /path/to/project

3. svnadmin load /path/to/project < /tmp/project.dump

4. chmod own.own /path/to/project -R

Shared memory (file base) in Java

import java.io.File;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
import java.text.SimpleDateFormat;
import java.util.Date;

public class SmWrite {

    public static void main(String[] args) throws Exception {
        File file = new File("c:/mem.txt");
        int length = (int) file.length();
        String mode = "rw";
        FileChannel fc = new RandomAccessFile(file, mode).getChannel();
        MappedByteBuffer mbb = fc.map(MapMode.READ_WRITE, 0, length);
        String format = "yyyy/MM/dd HH:mm:ss";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        while (true) {
            String now = sdf.format(new Date());
            byte[] b = now.getBytes();
            mbb.rewind();
            mbb.put(b, 0, b.length);
            mbb.force();
            Thread.sleep(1000);
        }
    }
}

import java.io.File;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
import java.text.SimpleDateFormat;

public class SmRead {

    public static void main(String[] args) throws Exception {
        File file = new File("c:/mem.txt");
        int length = (int) file.length();
        String mode = "rw";
        FileChannel fc = new RandomAccessFile(file, mode).getChannel();
        MappedByteBuffer mbb = fc.map(MapMode.READ_WRITE, 0, length);
        String format = "yyyy/MM/dd HH:mm:ss";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        byte[] b = new byte[format.length()];
        while (true) {
            mbb.rewind();
            mbb.get(b, 0, b.length);
            String now = new String(b);
            System.out.println(now);
            Thread.sleep(1000);
        }
    }
}

reference : http://www.javaworld.com.tw/jute/post/view?bid=29&id=273887

Try catch in SQL Server 2005

BEGIN
    BEGIN TRANSACTION 
    BEGIN TRY
        // QUERY HERE
    END TRY
    BEGIN CATCH
        PRINT ERROR_MESSAGE();
        ROLLBACK
    END CATCH
END

.net closure

Thread t = new Thread(() =>
    {
        while (true)
        {
            Console.WriteLine(DateTime.Now);
            Thread.Sleep(1000);
        }
    }
);

t.Start();

reference : http://diditwith.net/2007/02/09/WhatsInAClosure.aspx

i.e. CSS expression

<html>
<style>
p {
border:1px solid red;
max-width:30em;
width:expression( 
    document.body.clientWidth > (500/12) * 
    parseInt(document.body.currentStyle.fontSize)?
        "30em":
        "auto" );
}
</style>
<body>
<p>
[alot of text]
</p>
</body>
</html>

reference : http://www.svendtofte.com/code/max_width_in_ie/