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  The Basics of jQuery

So, a while back I had an internal presentation at work about this topic. A few good friends in the community took a look at my slides, and they thought it would make a nice blog post because “there can’t be too many good posts about jQuery introduction and best-practices.” Whether this post is going to be good or not, is up to you but I’ll try to outline what jQuery is, and how you can start working with it. For most of you, this will just be a re-cap and probably...

   JavaScript,jQuery,Framework,Basic     2012-03-01 04:57:18

  Java Polymorphism and Overriding Methods

Most Java developers will be familiar with polymorphism – we’ve all seen the example of the Dog and Cat classes inheriting from some abstract Animal class and having their say() methods produce different results. But it’s still worthwhile to look at a few simple examples to reinforce the concepts.First, we define a simple class with one instance method and one static method.public class A { public String getName() { return "I a...

   Java,Overriding,Polymorphism,Demo,Dynami     2011-10-04 14:09:06

  Some thoughts about competitive programming

Many programmers may have experience in participating different kinds of coding competition while they are in college. Many of them are hired by top IT companies for their excellent performance during these kinds of coding competitions. There are some famous competitions organized by IT companies such as Google Code Jam, Facebook hackathons etc. Coding competitions are places where programmers can show their talents in programming and the skills they have. Usually programmers will solve some to...

   Coding,competition     2014-03-02 07:26:21

  Cool HTML5 matrix effect

Do you still remember the movie The Matrix? Do you still remember the cool matrix effect in that movie? How is that effect achieved? Shaun Dunne shared a piece of HTML5 code which displays a cool matrix effect. The matrix demo can be found here. Below is the code which he achieves this effect: with var s = window.screen; var width = q.width = s.width; var height = q.height = s.height; var letters = Array(256).join(1).split(''); var draw = function () { q.getContext('2d').fillStyle='rgba(0,0,...

   Matrix,HTML5     2013-08-14 08:03:34

  PHP Query String

Query string plays important role in building web applications, especially if you want to make nice urls without question mark and many key, value pairs, actually it is not so easy to design application with nice urls however it is always worth doing so, because it not only looks very proffessional, such URLs are search engine friendly, which means that they will get indexed faster but also it happens that search engines have problems with indexing pages with more then 3 key=value pairs in query...

   PHP,Query string,Request,Security     2011-10-01 02:23:15

  Differences between bashrc and profile in Linux

After login to a Linux system, the command console will show up with a prompt label such as # or ~, a shell command can be typed after this prompt and the system can execute the command thereafter. All these operations are handled by shell. Shell is a command language interpreter that executes commands read from the standard input device (keyboard) or from a file. There are different types of shells such as bash, ksh, csh etc. The most commonly used of them is bash and it's also the de...

   LINUX,PROFILE,BASH,BASHRC,.BASHRC,.PROFILE     2016-11-05 22:17:51

  Notes on Programming in C

Introduction       Kernighan and Plauger's The Elements of Programming Style was an important and rightly influential book.  But sometimes I feel its concise rules were taken as a cookbook approach to good style instead of the succinct expression of a philosophy they were meant to be.  If the book claims that variable names should be chosen meaningfully, doesn't it then follow that variables whose names are small essays on their use are even better?  Isn't MaximumV...

   C,Notes,Tips     2011-12-09 07:55:47

  Python Performance Tips, Part 1

To read the Zen of Python, type import this in your Python interpreter. A sharp reader new to Python will notice the word “interpreter”, and realize that Python is another scripting language. “It must be slow!” No question about it: Python program does not run as fast or efficiently as compiled languages. Even Python advocates will tell you performance is the area that Python is not good for. However, YouTube has proven Python is capable of serving 40 million videos...

   Python,Performance,Efficiency,Tips     2012-02-14 10:50:22

  C Macro Tips and Tricks

Preprocessor vs Compiler To properly understand C macros, you must understand how a C program is compiled. In particular, you must understand the different things that happen in the preprocessor and in the compiler. The preprocessor runs first, as the name implies. It performs some simple textual manipulations, such as: Stripping comments. Resolving #include directives and replacing them with the contents of the included file. Evaluating #if and #ifdef directives. Evaluating #defin...

   C,Macro,Preprocessor,Trick     2012-05-01 06:49:05

  Python: copying a list the right way

new = old[:] Those proficient in Python know what the previous line do. It copies the list old into new. This is confusing for beginners and should be avoided. Sadly the [:] notation is widely used, probably because most Python programmers don’t know a better way of copying lists.A little bit of pythonic theoryFirst we need to understand how Python manages objects & variables. Python doesn’t have variables like C. In C a variable is not just a name, it ...

   Python,List,Copy,Reference,[:],list()     2011-11-07 08:04:48

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