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  The business of software

Inspired by a talk I gave yesterday at the BOS conference. This is long, feel free to skip!My first real job was leading a team that created five massive computer games for the Commodore 64. The games were so big they needed four floppy disks each, and the project was so complex (and the hardware systems so sketchy) that on more than one occasion, smoke started coming out of the drives.Success was a product that didn't crash, start a fire or lead to a nervous breakdown.Writing software...

   Software,Design,Business,Software design     2011-10-29 07:22:09

  Deep Understanding of ReentrantLock: Unlocking the Mysteries of Java Concurrent Programming

ReentrantLock introduction ReentrantLock is a class in the Java concurrent package, java.util.concurrent.locks, and is an implementation of the Lock interface. As its name suggests, it is a reentrant mutual exclusion lock. A mutual exclusion lock is a synchronization tool used to protect shared resources, ensuring that only one thread can access the resource at a given time. Reentrant means that a thread can acquire the same lock multiple times without causing a deadlock. This lock provides some...

   JAVA,REENTRANTLOCK,CONCURRENCY,MULTITHREADING     2023-05-22 08:01:13

  Find the kth smallest number in an array

This is an classical question, the general solution to this question is first using sorting algorithm to sort the array, then get the kth number in the array, the complexity is O(nlogn), we can also use selective sort or head sort to, the complexity of selective sort is O(kn) and heap sort is O(nlogk). The better solution is to use quick sort to find the kth smallest number, the complexity is O(n), the worst case cost is O(n^2). But today we introduce one more solution which has the worst case c...

   Sort, Quick sort, Search,Smallest     2013-01-09 06:20:54

  CSS and HTML5 responsive images

With the popularity of Retina screen, the requirement of the images in the webpages is higher. How to make sure the image still clear while enlarging twice on retina screen? This brings much trouble to web developers, the good news is CSS3 and HTML5 is trying to change this, we can use response image. What is responsive image? It means user agent loads different images according to different resolutions of output devices, it will not waste bandwidth as well. In addition, it can load respective ...

   CSS3, HTML5,image-set,responsive image     2013-03-10 03:30:07

  The Web: Important Events in its History

Straight forward simple fact of the functioning evening: The netting is normally not the same element as appearing the world vast world wide web. Brain damaged, correct? Related to the Included Press Stylebook, the “Net is normally a decentralized, world-wide web 2 . 0 of pcs that may talk with every solo diverse. The Environment Huge World wide web, like announcements, is usually normally a subset of the World wide web.” If the web is not really the internet, then what is it? The c...

       2019-06-03 00:06:00

  Ruby is beautiful (but I’m moving to Python)

The Ruby language is beautiful. And I think it deserves to break free from the Web. I think the future of Ruby is firmly stuck in Web development, though, so I’m going to invest in a new language for data analysis, at least for now. This is a look at the fantastic language I came to from Java and a look at a possible candidate. (Update: I’ve since written a followup.)Java to RubySix years ago, I added Ruby to my technical arsenal. I learned C++ and Java in high school, and I p...

   Ruby,Java,Python,Comparison,Advantage,Ruby vs Python     2011-11-01 07:18:11

  Use cases of Java enumeration

JDK 1.5 introduces a new type -- enumeration. In Java, it's just a small feature, but it can bring us much convenience.Here we summarize some use cases of Java enumeration. 1. Constant Prior to JDK 1.5, we can define constant as public static final..., now we can use enumeration to group all constants in one enum variable and it also provides some useful functions. public enum Color {     RED, GREEN, BLANK, YELLOW   }  2.In Swit...

   Java, Enum,enumeration     2013-01-05 09:15:30

  The Ultimate GetElementsByClassName, Anno 2008

Two and a half years ago, I released the first version of getElementsByClassName. With how web browsers has evolved since, I thought I’d release a real ultimate version, dated 2008. Native Web Browser SupportSafari 3.1 has native getElmentsByClassName support, and upcoming Firefox 3 and Opera 9.5 will have it too. It only leaves out, you’ve guessed it, Internet Explorer.The Necessity Of This ScriptLiving in a world where Microsoft is halting every possible way t...

   JavaScript,geElementsByClassName,Cross browser compatible,Implementation     2011-11-26 02:46:20

  Pros and cons of 6 most popular test automation frameworks

Not everyone dappling into systems for test automation knows how to leverage the maximum benefit and keep them going in top shape for a long time. That's where test automation frameworks come in – they're basically sets of rules, standards, protocols and guidelines which can be incorporated into practice or simply followed to provide beneficial execution environments for automation test scripts.   Why are test automation frameworks important?   Test automation frameworks offer m...

       2015-11-30 08:14:23

  Go vs C benchmark. Could Go be faster than C?

During last semester I was attending Multiprocessor Architectures course, given at Facultad de Informática where I study my Computer Science degree. As part of the assignments due to pass the course, we had to do several programs written in C to benchmark matrix multiplication by testing different techniques and technologies. First of all we had to do a secuential program in three different versions: A normal one where the result matrix is ordered by rows and the loops range the matrix by ...

   Gp,C,Benchmark,Faster,Speed,Comparison     2012-02-08 10:09:07

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