Important:

Double check your operate system: ONLY  Debian 8 (Jessie) works with this instruction

Apache version: 2.4 which is the default version comes with Debian 8 (Not working with Apache 2.2 or lower)

Install Apache2:

Update package list and upgrade outdated packages:

sudo apt-get update && sudo apt-get upgrade

Install Apache2:

sudo apt-get install apache2

Install PHP7:

Since PHP7 is not included in any Debian official source list, we gonna use the version compiled by Dotdeb.org, which is pretty widely used.

Add source:

sudo nano /etc/apt/sources.list

Add the following two lines to the end of the file:

deb http://packages.dotdeb.org jessie all
deb-src http://packages.dotdeb.org jessie all

If you server is far from US, try find the nearest mirror: https://www.dotdeb.org/mirrors/

Get and Install GnuPG key:

wget https://www.dotdeb.org/dotdeb.gpg
sudo apt-key add dotdeb.gpg

Update packages again

sudo apt-get update

Install PHP7:

here is a list of available packages currently: (By the way, Swoole also work with php7, use ‘pecl install swoole to install’)

php7.0-apcu       php7.0-dbg        php7.0-imagick    php7.0-memcached  php7.0-phpdbg     php7.0-sybase
php7.0-apcu-bc    php7.0-dev        php7.0-imap       php7.0-mongodb    php7.0-pspell     php7.0-tidy
php7.0-bz2        php7.0-enchant    php7.0-interbase  php7.0-msgpack    php7.0-readline   php7.0-xdebug
php7.0-cgi        php7.0-fpm        php7.0-intl       php7.0-mysql      php7.0-recode     php7.0-xmlrpc
php7.0-cli        php7.0-gd         php7.0-json       php7.0-odbc       php7.0-redis      php7.0-xsl
php7.0-common     php7.0-gmp        php7.0-ldap       php7.0-opcache    php7.0-snmp
php7.0-curl       php7.0-igbinary   php7.0-mcrypt     php7.0-pgsql      php7.0-sqlite3

Choose your list of mod, install with php

sudo apt-get install php7.0 php7.0-common php-pear #add your list of mods here

Install mod_php7 for Apache 2.4 and restart apache:

sudo apt-get install libapache2-mod-php7.0
sudo service apache2 restart

That’s it! Done!

 

Today, I just got my Banana Pi R1.  Here is a simple guide to set it up as an OpenWRT router.

Step 1: Flash the TF(microSD) card.

• Goto the download page of BPi-R1 (http://www.bananapi.com/index.php/download?layout=edit&id=65)
• Find and download the latest OpenWRT Image, which is version 4.0 (01/09/2015) as I write this.
• Write the OpenWRT image to the TF card. I use OS X, here is the code I used in Terminal:
• Find the disk number of your TF card. Mine is disk2[Bold number may varies on your computer, wrong number will cause serious problem, you will lose your data on the wrong disk]:

  diskutil list

  Unmount it:

  diskutil unmountDisk /dev/disk<strong>2</strong>

  Write the image:

  sudo dd bs=1m if=~/Downloads/BPI-R1_OpenWrt_V4.0.img of=/dev/rdisk<strong>2</strong>

• If you are using other OS, follow the guide here (From Raspberry Pi, their are all the same except the image)
• Eject the TF card  from your computer and insert it into Banana Pi.

Step 2: Power On your Banana Pi R1.

• Plug in the 5V power cord to the correct port, it will power on by itself.
• HDMI is not working on OpenWRT(only works few seconds while booting)
• Connect the BPI-R1’s WAN to your home router/switch’s LAN (Assume DHCP is enabled )
• Find the BPI-R1’s IP address. You may find it in the web management interface of your home router. Scan port 80 and 22 for the whole subnet other wise.
• use root/admin to login BPI-R1
• Mostly Done.

After that, I found only 80M(VFAT) + 150M(EXT4) was used on BPI-R1, which waste pretty much space on my 32GB TF card.

Extra Step: Expand the ext4 partition. (Inspired by SaruMaaz)

• Download Gparted Live
• Write Image to a Flash Drive (Assume the flash drive is disk2)

  sudo dd bs=4m if=~/Downloads/gparted-live-0.24.0-2-i586.iso of=/dev/rdisk<strong>2</strong>;sync

• Restart OS X and hold Option key while booting,
• Chooes ‘EFI Disk’
• Enter your language code
• Enter 0 and get to the GUI
• Plug in the TF card, Find the TF card (mine is sdd)
• Find the 150M partition, right click, change the size…
• Apply
• Done

今天偶然发现Netbeans不能显示中文，本来以为是charset的问题，然后意识到错误的charset会导致乱码，而不是小方块。

经过测试，使用最常用的英文字体，例如Arial, New Times Roman 都可以正常显示中文。其余字体，比如编程常用的MonoSpace，Consolas，Monaco什么的会无法显示中文。如图：

经过一番搜索，找到原因，简单地说，原因在于这些字体里面不包含中文，fallback font也没有中文.

又搜了一大圈，发现了一个很好的第三方字体，使用Consolas+微软雅黑中文，非常漂亮，成功解决，如图：（如果细心就会发现字数不一样，所以只是我的一个例子么～）

 

下载链接：

http://ishare.iask.sina.com.cn/f/8965397.html

备用链接：

YaHei.Consolas.1.12

Write a method named hasMidpoint that accepts three integers as parameters and returns true if one of the integers is the midpoint between the other two integers; that is, if one integer is exactly halfway between them. Your method should return false if no such midpoint relationship exists.
The integers could be passed in any order; the midpoint could be the 1st, 2nd, or 3rd. You must check all cases.
Calls such as the following should return true:
hasMidpoint(4, 6, 8)
hasMidpoint(2, 10, 6)
hasMidpoint(8, 8, 8)
hasMidpoint(25, 10, -5)
Calls such as the following should return false:
hasMidpoint(3, 1, 3)
hasMidpoint(1, 3, 1)
hasMidpoint(21, 9, 58)
hasMidpoint(2, 8, 16)
=========================================================
以下是我和晓天想出来的答案。我们最开始打算先进行排序，再求差，来判断，很是程序写起来会很长，而且我们现在没有讲各种排序法。
=========================================================

public static boolean hasMidpoint(int a,int b,int c){
    int e=a+b+c;
    if (e/3==a||e/3==b||e/3==c)
        return true;
    return false;
}

=============================================================

# name expected return your return result
1 hasMidpoint(1, 2, 3) true true pass
2 hasMidpoint(2, 10, 6) true true pass
3 hasMidpoint(0, -50, -25) true true pass
4 hasMidpoint(21, 9, 58) false false pass
5 hasMidpoint(-2, 9, 27) false false pass
=================================================
提交答案之后，我突然觉得这个程序存在问题，虽然在系统给的数值里没有测出问题，但是由于int类数据的特点，10/3是等于3的。所以输入以下测试代码。
==================================================

public class test{
public static void main(String[] args){
System.out.println(hasMidpoint(0,-51,-25));
}
public static boolean hasMidpoint(int a,int b,int c){
int e=a+b+c;
if (e/3==a||e/3==b||e/3==c)
return true;
return false;
}
}

//由于是复制过来的，就不能保持很好的代码格式了。

=============================================================
输出结果：true
=============================================================
很显然，-25不是-51和0的中点，刚刚的源码是有问题的。
=================================================
把if的条件语句作了如下调整：

if ((e/3==a||e/3==b||e/3==c)&&e%3==0)

再次调用

System.out.println(hasMidpoint(0,-501,-250));

输出是false
=================================================
现在基本已经不会存在问题了，通过了我的所有测试。
如果有人认为我的代码还存在问题，欢迎回复。