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The Go Programming Language

Good day! Try out [The Go Programming Language] . As quoted from its home page, Go is … … simple package main import "fmt" func main() { fmt.Printf("Hello, 世界\n") } … fast Go compilers produce fast code fast. Typical builds take a fraction of a second yet the resulting programs run nearly as quickly as comparable C or C++ code. … safe Go is type safe and memory safe. Go has pointers but no pointer arithmetic. For random access, use slices, which know their limits. … concurrent Go promotes writing systems and servers as sets of lightweight communicating processes, called goroutines, with strong support from the language. Run thousands of goroutines if you want—and say good-bye to stack overflows. … fun Go has fast builds, clean syntax, garbage collection, methods for any type, and run-time reflection. It feels like a dynamic language but has the speed and safety of a static language. It’s a joy to use. … open source Install Go! Click [h...
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POSIX cksum algorithm in Java

Most Unix programs rely on cksum for checking duplicate files. If you happen to migrate programs doing that, you need to make sure that you’ll be using the same algorithm for the same functionality of course. Here is the [cksum algorithm] and here is the [cksum man] page. The class below is implementing the java.util.zip.Checksum interface for extensibility. /** * Compute the checksum of a data stream using the * POSIX cksum algorithm. */ public class Cksum implements Checksum { /** * The checksum value. */ private int value; /** * The length of the stream. */ private int length; /** * The cksum payload. */ private final int[] payload = { 0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FD...
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HTTP reader in Java

While there are numerous ways of accessing web services, here is a primitive way of doing it. This is a simple class for reading HTTP responses. You can take advantage of this, classic examples are, 1. Reading twitter feeds for executing commands in a target machine 2. Getting the latest articles in a particular website 3. Translating through Google Translate 4. Arithmetic operations through Google 5. Currency conversion through Google and more! Here is the class. /** * Hyper-Text Transfer Protocol Reader. * * @author joset */ public final class HttpReader { private Map<String, List<String>> responseHeader; private URL responseUrl; private String mimeType; private String charset; private Object content; private int responseCode = -1; /** * Constructor requiring the URL string. */ public HttpReader(final String urlString) throws MalformedURLException, IOException { // open a connection. fin...
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Delete files and directories recursively in Java

This post will teach you how to delete files and directories in Java recursively. There is nothing special in this post but I’m sure this will be useful especially for those who are just starting out their programming career in Java. boolean deleteRecursively(final File file) { if (file.exists()) { final File[] files = file.listFiles(); for (int i = 0; i < files.length; i++) { if (files[i].isDirectory()) { deleteRecursively(files[i]); } else { files[i].delete(); } } } return (file.delete()); } This code was not tested. Please read the Java 6 File API documentation [here] for more information. "Confidence means non-paralysis, a willingness to act, and act decisively, to start new things and cut failing ventures off." - Tom Peters
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Locking a file in Java

Locking a file in Java is platform dependent. Write once run anywhere? Thumbs down. Some platforms will not allow a file access without a lock while others will. This is very useful especially when writing your own database (I know some people will argue but this is still happening in corporations handling very sensitive data). It starts with a simple file access. try { final File file = new File("Tables.dat"); final FileChannel fileChannel = new RandomAccessFile(file, "rw").getChannel(); // this method will block until a lock is acquired final FileLock lock =fileChannel.lock(); // this method will not block, it will return null or throw an exception lock = fileChannel.tryLock(); // TODO: do something with the file // release the lock lock.release(); // cleanup / close file fileChannel.close(); } catch (Exception e) { // TODO: handle exception } Caution: You really need to verify how the target platform...
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Earth planner - Architect Felino Palafox Jr. (Manila Bulletin)

Earth planner Architect Felino Palafox, Jr. October 17, 2009, 8:49am THE MMetroplan is to Felino Palafox Jr. as the ark is to Noah. Through the plan and the ark, respectively, both forewarned their people of destruction to come their way if they didn’t mend their ways. Unfortunately, both were not heeded - and we all know what happened thereafter. “It was not an act of God. The devastation caused by Typhoon Ondoy could have been averted if humans only listened,’’ firmly believes world-renowned Filipino architect Palafox. Palafox, of course, completely knows what he was talking about. More than 30 years ago, in 1977, he came out with the Metro Manila Transport, Land Use and Development Planning project, a World Bank-funded report that aimed to protect Metro Manila from further flooding. In this report, recommendations were made for transportation, land use, zoning, and flood control, particularly in the eastern part of the metropolis, specifically in – you guessed it – Marikin...
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vrms - Virtual Richard M. Stallman

Though I am aware that there are non-free packages lurking in my box, I want to be precise, thanks to Virtual Richard M. Stallman . Non-free packages installed on linux-conqueror fglrx-modaliases Identifiers supported by the ATI graphics driver linux-generic Complete Generic Linux kernel linux-restricted-modules- Non-free Linux 2.6.28 modules helper script linux-restricted-modules- Restricted Linux modules for generic kernels nvidia-173-kernel-source NVIDIA binary kernel module source nvidia-173-modaliases Modaliases for the NVIDIA binary X.Org driver nvidia-180-modaliases Modaliases for the NVIDIA binary X.Org driver nvidia-71-modaliases Modaliases for the NVIDIA binary X.Org driver nvidia-96-modaliases Modaliases for the NVIDIA binary X.Org driver nvidia-glx-173 NVIDIA binary Xorg driver skype Skype - Take a deep breath tangerine-icon-theme Tangerine Icon theme virtualbox-3.0 Sun Virt...
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Linus’ discussion about goto statements

As discussed by Linus Torvalds 6 years ago, From: Linus Torvalds Subject: Re: any chance of 2.6.0-test*? Date: Sun, 12 Jan 2003 12:22:26 -0800 (PST) On Sun, 12 Jan 2003, Rob Wilkens wrote: > > However, I have always been taught, and have always believed that > “goto”s are inherently evil. They are the creators of spaghetti code No, you’ve been brainwashed by CS people who thought that Niklaus Wirth actually knew what he was talking about. He didn’t. He doesn’t have a frigging clue. > (you start reading through the code to understand it (months or years > after its written), and suddenly you jump to somewhere totally > unrelated, and then jump somewhere else backwards, and it all gets ugly > quickly). This makes later debugging of code total hell. Any if-statement is a goto. As are all structured loops. And sometimes structure is good. When it’s good, you should use it. And sometimes structure is _bad_, and gets into the way, and usi...
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What is going on?

Warning: Pure train of thought. My primary hard drive has crashed so I have to switch to Windows temporarily. There is nothing special happening lately except for the fact that I am enjoying life to the fullest. I can say that I am on the right track. I really thank God for that. Personal projects are keeping me busy these days. Next month I will be pursuing my MSCS degree. Hopefully this time, I am mature enough to handle school stuffs. Anyway here are stuffs for you to check, When Nature is Freakier than Sci-Fi Artificial Intelligence Blizzard Entertainment CitiSecOnline - Philippines Online Stockbroker
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IBM Signed Numeric Table

If you are dealing with IBM mainframes, you will see signed numbers written this way. { = 0 } = -0 A = 1 J = -1 B = 2 K = -2 C = 3 L = -3 D = 4 M = -4 E = 5 N = -5 F = 6 O = -6 G = 7 P = -7 H = 8 Q = -8 I = 9 R = -9 Enjoy! “Stupidity is doing the same things repeatedly and expecting different results!”
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