Austin's Note

Shell script輸出有顏色的文字

Austin — Fri, 22 Jul 2011 05:39:50 +0000

# Color defination
txtRed=$(tput setaf 1)
txtGreen=$(tput setaf 2)
txtYellow=$(tput setaf 3)
txtBlue=$(tput setaf 4)
txtPurple=$(tput setaf 5)
txtCyan=$(tput setaf 6)
txtWhite=$(tput setaf 7)
txtReset=$(tput sgr0)

# Style defination
txtBold=$(tput bold)
txtUL=$(tput smul)

# Example
echo "${txtRed}Red text"
echo "still Red text"

echo "$txtReset"
echo "Normal text"

Reference: How to echo colored text in linux shell script

Eclipse RAP execute javascript

Austin — Thu, 21 Jul 2011 01:50:49 +0000

方法一把輸出字串當javascript執行，方法二只是把方法一包到PhaseListener，為什麼要這樣包還不太清楚，所以先用方法一

try {
	RWT.getResponse().getWriter().println("alert('123');");
} catch (IOException ex) {
	ex.printStackTrace();
}

RWT.getLifeCycle().addPhaseListener(new PhaseListener() {
	private static final long serialVersionUID = 1995219943700635190L;

	@Override
	public PhaseId getPhaseId() {
		return PhaseId.RENDER;
	}

	@Override
	public void beforePhase(PhaseEvent event) {
		try {
			RWT.getResponse().getWriter().println("alert('1');");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void afterPhase(PhaseEvent event) {
		try {
			RWT.getResponse().getWriter().println("alert('2');");
		} catch (IOException e) {
			e.printStackTrace();
		}
		RWT.getLifeCycle().removePhaseListener(this);
	}
});

HttpBaseJsp

Austin — Wed, 18 May 2011 05:55:10 +0000

package org.gclin.core.web;

import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.HttpJspPage;
import javax.servlet.http.HttpServlet;

public abstract class HttpBaseJsp extends HttpServlet implements HttpJspPage {
	private static final long serialVersionUID = 5971944450223631606L;

	@Override
	public void init(ServletConfig config) throws ServletException {
		super.init(config);
		jspInit();
		_jspInit();
	}

	@Override
	protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		_jspService(request, response);
	}

	@Override
	public void destroy() {
		jspDestroy();
		_jspDestroy();
	}

	@Override
	public void jspInit() {}
	public void _jspInit() {}

	@Override
	public void jspDestroy() {}
	protected void _jspDestroy() {}

	@Override
	public void _jspService(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {}

}

<%@page contentType="text/html; charset=BIG5"
	extends="org.gclin.core.web.HttpBaseJsp"%>
...

Develop Google App Engine by Eclipse

Austin — Mon, 18 Apr 2011 09:00:59 +0000

Step 1. Install plugin from update site
Eclipse => Help => Install New Software => Add
Name: Google app Engine
Location: http://dl.google.com/eclipse/plugin/3.6

Step 2. Create GAE project
File => New => Project
type filter text: Web Application Project
type project name, package and uncheck "Use Google Toolkit"

Step 3. Specified applications for this project
Package Explorer => this project => war => WEB-INF => appengine-web.xml
name of your application

Step 4. Test and Deploy
Just click the button "Run" or "Deploy App engine project" on toolbar
Test URL: http://localhost:8888/ (Default)
GAE URL: http://name of your application.appspot.com

RAP Login Dialog

Austin — Mon, 18 Apr 2011 06:17:43 +0000

public class MyEntryPoint implements IEntryPoint {
    public int createUI() {
        Display display = PlatformUI.createDisplay();
        LoginInfo info = null;
        while (info == null) {
            LogonDialog dialog = new LogonDialog(display.getActiveShell());
            try {
                info = checkLogin(dialog.getUsername(), dialog.getPassword());
            } catch (Exception e) {
                MessageDialog.openError(display.getActiveShell(), "Error", "Logon Fail:\n" + e.getMessage());
            }
        }
        return PlatformUI.createAndRunWorkbench( display, new ApplicationWorkbenchAdvisor());
    }
}

Eclipse for RCP and RAP + GWT + WindowBuilder

Austin — Thu, 17 Feb 2011 15:49:38 +0000

Eclipse for RCP and RAP Developers
http://www.eclipse.org/downloads/packages/eclipse-rcp-and-rap-developers/heliossr1

Google Web Toolkit Overview
http://code.google.com/intl/en/webtoolkit/overview.html

WindowBuilder Pro
http://code.google.com/intl/zh-TW/javadevtools/wbpro/index.html

PowerPoint中雙螢幕設定

Austin — Thu, 02 Dec 2010 09:46:50 +0000

點擊選單 投影片放映 => 設定放映放式
1. 指定播放畫面
2. 顯示簡報者檢視畫面(感覺不錯)

Cygwin快速複製貼上

Austin — Wed, 01 Dec 2010 02:13:59 +0000

Step 1. 啟動Cygwin

Step 2. 開啟視窗內容
標題列按右鍵 => 內容

Step 3. 勾選快速編輯模式
選項 => 快速編輯模式 => 確定

Using Boost libraries with Visual Studio 2008

Austin — Tue, 13 Apr 2010 12:07:02 +0000

網站：Boost C++ Libraries(下載)

Step 1. 取得Boost libraries
到網站的Download去下載，然後解壓縮(D:/boost_1_42_0)

Step 2. 建置Bjam
進入D:/boost_1_42_0，然後執行bootstrap.bat
跑完之後在這個目錄就會多出一個bjam.exe

Step 3. 建置Boost Libraries
在D:/boost_1_42_0建立一個buildall_vc90.bat內容如下

bjam toolset=msvc-9.0 variant=debug threading=multi link=shared define=_BIND_TO_CURRENT_VCLIBS_VERSION
bjam toolset=msvc-9.0 variant=release threading=multi link=shared define=_BIND_TO_CURRENT_VCLIBS_VERSION

執行剛剛建立的那個buildall_vc90.bat，等他跑完在D:\boost_1_42_0\stage\lib應該有一堆*.lib、*.dll

Step 4. 設定Visual Studio 2008
開啟Visual Studio 2008，工具 => 選項 => 專案和方案 => VC++目錄
顯示目錄的那個下拉選單
選Include檔案加入D:\boost_1_42_0
選程式庫檔加入D:\boost_1_42_0\stage\lib

Stack overflow

Austin — Tue, 16 Mar 2010 17:19:21 +0000

最近遇到的一個問題Stack overflow，不難解~改用new＆delete就對了丫，結果還是錯，找了一下資料是用new＆delete沒錯，但是為啥不行，最後發現原來還有別的地方有用一樣的數字來宣告，程式如下：
一開始找出來發生錯誤的地方(我一直以為是這錯@@a)

const unsigned int numSolution1 = 50;

// 掛
Solution sol1[numSolution1];

// 正常來說改成這樣就OK了，結果調成100還是會掛
Solution *sol1 = new Solution[numSolution1];

最後發現~另外還有幾個個檔案有類似下面的程式：

// 掛，因為這邊也要改用new
const unsigned int numSolution2 = numSolution1 * 2;
Solution sol2[numSolution2];

　
Stack overflow
Compile時會過，執行時會錯@@
錯誤訊息：. . . . . . 發生未處理的例外狀況: 0xC00000FD: Stack overflow
主要原因是因為Stack有大小限制，而且我們一般直接宣告出來的變數是放在Stack，如果在Stack放出大量資料，就會發生Stack overflow，解決方法就是改用new＆delete，這樣一來資料就會改成用heap來儲存，也就不會受限於Stack的大小了。只是速度也比較慢，另外要特別注意記得要delete。

// 下面四個for的cup time都介於0.25s左右
for(unsigned int i = 0; i < 100000000; ++i) {
	int sol[20];
}

for(unsigned int i = 0; i < 250000; ++i) {
	int *sol = new int[20];
	delete [] sol;
}

for(unsigned int i = 0; i < 100000000; ++i) {
	Solution sol[20];
}

for(unsigned int i = 0; i < 2500; ++i) {
	Solution *sol = new Solution[20];
	delete [] sol;
}

　
參考資料：堆(heap)和棧(stack)、MFC – STACK溢位