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下述密码均摘自互联网

【字母表顺序】-数字 
　　加密的时候，经常要把A~Z这26个字母转换成数字，最常见的一种方法就是取字母表中的数字序号。A代表1，B代表2，C代表3... 

　　字母 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 
　　数字 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 

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#include <iostream>
#include <math.h>
using namespace std;

template <class T>
struct Node {
    T value;
    Node *left;
    Node *right;

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搭建：
收集自：http://www.cloudfly.info/archives/36
安装apache2
sudo apt-get install apache2
安装完成，运行如下命令重启下：

sudo /etc/init.d/apache2 restart
在浏览器里输入http://localhost或者是http://127.0.0.1，如果看到了“It works!“，那就说明Apache就成功的安装了，Apache的默认安装，会在/var下建立一个名为www的目录，这个就是Web目录了，所有要能过浏览器访问的Web文件都要放到这个目录里。

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#!/usr/bin/env python
#coding=utf-8
#
# Generate a list of dnsmasq rules with ipset for gfwlist
#
# Copyright (C) 2014 http://www.shuyz.com
# Ref https://code.google.com/p/autoproxy-gfwlist/wiki/Rules

import urllib2
import re

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/**
 * Copyright (c) 2013 Xcellent Creations, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:

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/*
  Source: http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/
  USAGE:
   
  ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
      @Override
      public void onItemClicked(RecyclerView recyclerView, int position, View v) {
          // do it
      }
  });

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Title

<Additional information about your API call. Try to use verbs that match both request type (fetching vs modifying) and plurality (one vs multiple).>

• URL

  <The URL Structure (path only, no root url)>

• Method:

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Material Animations

[Android Transition Framework][transition-framework] can be used for three main things:

1. Animate activity layout content when transitioning from one activity to another.
2. Animate shared elements (Hero views) in transitions between activities.
3. Animate view changes within same activity.

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Analyze & Manage Memory on Android Like a Boss

This Blog is all about memory management in Android. It provides information about how you can analyze & reduce memory usage while developing an Android app.

Memory management is a complex field of computer science and there are many techniques being developed to make it more efficient. This guide is designed to introduce you to some of the basic memory management issues that programmers face.

Memory Management in Android

Android is a Linux based operating system. It uses native open source C libraries which power Linux machines. All the basic operating system operations like I/O, memory management and so on are handled by the Linux kernel. Like Java and .NET, Android uses its own run time and virtual machine to manage application memory. Unlike either of these frameworks, the Android run time also manages the lifetime processes. Each Android application runs in a separate process within its own Dalvik instance, relinquishing all responsibility for memo

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Testing activity in Android Studio

How we build the app

Before we start writing our first UI test I want to describe our development process.

1. First, we write a test for a UI or logic that does not yet exist.
2. We expect to see build errors or failed tests.
3. Then we create a UI element or write program logic.
4. Finally, we run the test and make sure it passes.