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//定义script的正则表达式，去除js可以防止注入
String scriptRegex="<script[^>]*?>[\\s\\S]*?<\\/script>";
//定义style的正则表达式，去除style样式，防止css代码过多时只截取到css样式代码
String styleRegex="<style[^>]*?>[\\s\\S]*?<\\/style>";
//定义HTML标签的正则表达式，去除标签，只提取文字内容
String htmlRegex="<[^>]+>";
//定义空格,回车,换行符,制表符
String spaceRegex = "\\s*|\t|\r|\n";

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// Bad code. Lose NumberFomatException, but throw ArithmeticExcption
public class DisappearedException {
    public void show() throws BaseException{
        try{ 
            Integer.parseInt("Hello");
        }catch (NumberFormatException nfe) {
            throw new BaseException(nfe);
        } finally {
            try {
                int result = 2 / 0;

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/**
* The object creation time can be set to object’s identifier property. 
* For this purpose, System.currentTimeMillis() can be used. However, 
* two or more objects may be created in a single millisecond. 
* In this case, these objects will have the same id which is unacceptable. 
* One way to cope with this problem is to use System.nanoTime(). 
* Even if the nano time is the smallest interval we can use, it does not 
* also guarantee the uniqueness. To provide unique time stamps, 
* I got help from AtomicReference class as follows.
*/

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git init                                                  # 初始化本地git仓库（创建新仓库）
git config --global user.name "xxx"                       # 配置用户名
git config --global user.email "[email protected]"              # 配置邮件
git config --global color.ui true                         # git status等命令自动着色
git config --global color.status auto
git config --global color.diff auto
git config --global color.branch auto
git config --global color.interactive auto
git config --global --unset http.proxy                    # remove  proxy configuration on git
git clone git+ssh://[email protected]/VT.git             # clone远程仓库

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#!/bin/sh

sudo apt-get purge -y maven
if ! [ -e .semaphore-cache/apache-maven-3.3.3-bin.tar.gz ]; then (cd .semaphore-cache; curl -OL http://mirror.olnevhost.net/pub/apache/maven/maven-3/3.3.3/binaries/apache-maven-3.3.3-bin.tar.gz); fi
sudo tar -zxf .semaphore-cache/apache-maven-3.3.3-bin.tar.gz -C /usr/local/
sudo ln -s /usr/local/apache-maven-3.3.3/bin/mvn /usr/bin/mvn
echo "Maven is on version `mvn -v`"

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Libraries

• jQuery - The de-facto library for the modern age. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.
• Backbone - Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
• AngularJS - Conventions based MVC framework for HTML5 apps.
• Underscore - Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would expect in Prototype.js (or Ruby), but without extending any of the built-in JavaScript objects.
• lawnchair - Key/value store adapter for indexdb, localStorage

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Packages

• lxml - Pythonic binding for the C libraries libxml2 and libxslt.
• boto - Python interface to Amazon Web Services
• Django - Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.
• Fabric - Library and command-line tool for streamlining the use of SSH for application deployment or systems administration task.
• PyMongo - Tools for working with MongoDB, and is the recommended way to work with MongoDB from Python.
• Celery - Task queue to distribute work across threads or machines.
• pytz - pytz brings the Olson tz database into Python. This library allows accurate and cross platform timezone calculations using Python 2.4 or higher.

Guides

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console