Setting up your network consists of three steps. First we assign ourselves an IP address using ifconfig. Then we set up routing to the gateway using route. Then we finish up by placing the nameserver IPs in /etc/resolv.conf.

Transfer the string to Unicode and since Chinese is between 0x4e00 and 0x9fff, just check if there is a character in this range.

Introduction

There are many tools which can be used to make an installer, like NSIS, Install Shield, Advanced Installer, WiX, InnoSetup and even Visual Studio. Here I just show you how to make an installer by NSIS. NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. NSIS is script-based, which means you configure your installer by a script. That makes it small and flexible.

Just record this for possbile uses.

This article is about how to set up a PHP production environment on Arch system.

You need to connect 4 computers to the internet. Now you have 2 routers, but each with 3 LAN ports. How would you solve this issue?

Compare the following two segments of codes. Which do you think is better?

The Discrete Cosine Transform (DCT) algorithm constitutes an integral component of contemporary image/video processing applications.

The formal definition of DCT is:

\(X_k = \sum\limits_{n=0}^{N-1}{x_n}\cos{\left[\dfrac{\pi}{N}\left(n+\dfrac12\right)k\right]}\quad k=0,\ldots,N-1.\)

Before running apt-get command, run the following command:

I made a set of left-handed mouse cursors so that I can use my left-handed mouse more comfortably.

I just used a tool ArtCursors to import the standard cursors from Windows XP, and edited the cursors in ArtCursors, flipping and setting the hot-spot for each.

Now,  have a look:

In a very simple way it can be used to transfer files between two computers. You can create a server that serves the file with the following:

The idea is to retrieve the html file of the website and parse it to find the content between <title> and </title>.

To get the html file, we need a library in C++, as the standard library has no such functions. I choose the libcurl library, and you can download it here: http://curl.haxx.se/libcurl/.

When in disgrace with fortune and men’s eyes,

I all alone beweep my outcast state,

With OpenCV, it’s easy to rotate an image by code.

Update

This blog is obselete, please head forward to this blog.

I’m tired of transform shift-jis encoding to UTF-8 encoding for each file in my project these days, so I want to write a script to automatically do this job for me. After searching the Internet, I find it’s an easy job with the tool of Python.

Python, at least 2.6 version, has a library called codecs, and all we have to do is just using this library to read and write files in different encodings.

This code transforms all files, including files in sub-folders, from shift-jis encoding(or detected encodings) to UTF-8 encoding.

There are a lot of methods to get the path of a script in Python, but the following method always work, even you use py2exe or PyInstaller to compile the script to binary executable file.

Open the file named “.emacs” in your home folder. (if it doesn’t exist, create one.) Copy the following code and paste it into the opening file. Save the file and restart Emacs.

View the problem at POJ. It’s a problem from a contest in Northwestern Europe, 2002.

This is a classical Dynamic-Programing problem. The sate transformation equation is:

View the problem at POJ: 1009 Edge Detection.

The answer should be in format of Run Time Encoding. Let val[i] be the value, and len[i] be the length of the i-th pair. There is a corresponding location for each pair, ie the start point, and let row[i] be the row, and col[i] be the column of the start point for the i-th pair.

Sometimes, we would like to check if a remote host is reachable before we establish a connection. This is much like the function of the ping command in terminal. Well in Cocoa programing, you can use the function SCNetworkReachabilityCreateWithName().

Here is the code: