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Function Pointers in C are Underrated
The function pointer in C is, in my opinion, one of the most ignored gems of the language. It’s the kind of feature you rarely need, and then suddenly, one day, you find yourself in dire need of it, as evidenced by the real-life use-case below. If you don’t know what a function pointer is in the first place, here’s the meat of it: it gives you the ability to pass a function around like a normal variable. If you know Python / Ruby / Lisp, you might know it by the name...
Top 7 programmers bad habits
1.- The all code is crap, except mine, attitude. I have bad news for you buddy, all code is crap. No matter how much effort you put on it, there is always a majority of programmers who are going to think that your code sucks and that they could have done it 10 times better. I have already covered this topic in previous posts, you can find more information of what exactly I mean when I say that all the code is crap here and here. How to fix it: Don’t criticise others people code, it ...
programming,habit,tips 2011-06-07 00:36:22
Standardizing Python WSGI deployment
Over the past year I have been testing all of the new python platform as a service companies that have popped up, and I have posted my notes on my blog so that everyone can learn from my experiences. ep.io, apphosted.com, gondor.io, dotcloud.com, DjangoZoom.com, Heroku, Django hosting roundup, All and all, the platforms were very similar, they allowed you to easily host your python/django project without having to worry about managing a server or other typical system administr...
What the Heck are Algebraic Data Types? ( for Programmers )
This post is meant to be a gentle introduction to Algebraic Data Types. Some of you may be asking why you should learn Algebraic Data Types and how will they change your world? I am not going to answer that, but suffice it to say that Algebraic Data Types are the underpinning of the type systems to the ML derived languages, Haskell and OCaml included, and their construction and properties allow for the power (and inference) that accompanies these type systems. They are cropping...
Algebraic Data Type,Set,Operator,Programmer 2011-12-30 08:31:43
Code Refurbishment
Within our industry we use a huge range of terminology. Unfortunately we don’t all agree on what individual terms actually mean. I so often hear people misuse the term “Refactoring†which has come to make the business in many organisations recoil in fear. The reason for this fear I’ve observed is because of what people often mean when misusing this term.I feel we are holding back our industry by not being disciplined in our use of terminology. If...
Code Refurbishment,Code design,terminolo 2011-09-05 08:17:14
Commonly used AJAX frameworks
Have you ever wondered to design your website like desktop applications? Fortunately, with AJAX we can achieve this. By using AJAX, we no need to refresh the whole page when we just want to update a portion of a website such as the weather information or news panel. This makes our web apps look like desktop applications and bring good user experience to our visitors. You can create an XMLHttpRequest object every time when you want to initialize an AJAX call, unfortunately you may need repeat eve...
One reason why mcrypt responds slowly
This morning one colleague came over and talked about one script which used mcrypt responded very slowly, the server configurations are fine. But the reason for the slowness is unknown. Here is one script which reproduces the issue: <?php $dmcryptText = "dummy"; $key = "foobar"; $size = mcrypt_get_iv_size(MCRYPT_BLOWFISH,MCRYPT_MODE_ECB); $iv = mcrypt_create_iv($size); //Take care $m = mcrypt_ecb(MCRYPT_BLOWFISH, $key, $dmcryptText, MCRYPT_DECRYPT, $iv); var_dump($m); When 20 requests of&...
Understanding abstract interface in Java
Have you read about an interface declaration as public abstract interface InterfaceName in Java? At the first glance, is it a weird declaration? Why should we declare an interface as abstract? For example, we may see below code in some projects: public abstract interface MyInterface { public void check(); public abstract boolean check(boolean really); } Actually here abstract is redundant, an interface is implicitly abstract, we no need to put an abstract in front of interface. But it do...
Java,abstract interface 2014-08-18 23:07:27
The 9 lines of code of Google
Are you still remembering the then hot debated news about Oracle suing Google allegedly copying a small portion of codes from Oracle's Java in 2010. At that time, Oracle experts estimated that Google owes Oracle between $1.4 billion and $6 billion in damages if liable. But the court thought Oracle was eligible only for statutory damages for that copying, which were not expected to exceed a few hundred thousand dollars. At last, Oracle agreed the zero damage result. Are you curious about whi...
Google,Java,Open source 2014-08-15 20:29:52
Java Doesn't Need to Be So Bad
I do a lot of Java coding and I enjoy it. I admit that there is a lot of typing, often a lot of boilerplate and getting even simple tasks done can involve too much work. Most of the tools that try to fix these problems trade one moment saved for another lost. Maven's XML based configuration file is a good example: Thank you for making my project easier to manage and I won't forget that you made me edit XML to do so. These are the things that you live with, these are the things you trade for ...
Java,Coding,Enterprise application,Tedious 2011-12-09 07:50:20
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