Some tips and comparisons between Objective-C and Java. Also includes some features of the Objective-C language.

Optimizing algorithms at runtime with a domain-specific embedded language (DSEL) and LLVM

There is a whole bunch of super smart C++ types in the office talking about a strange little C++ program, which I'm turning into an emergency quiz.

Here, the sites I found across the internet that I tought will help you to master C / C++ programming in no particular order.

We use different concepts than typical XML based interop solutions by providing a seamless default mapping between Java, .NET and C++ objects. We have several customers who use mixed teams, usually .NET team which develop user interfaces for the desktop and Java or C++ server side processing teams. In our solution the objects are mapped to a canonical efficient representation. It is the framework's role to do the mapping and conversion and not of the user's. For this reason we can apply very sophisticated optimization which makes language boundaries unnoticeable from performance and efficiency perspectives.

This is a collection of 4 programming brain teasers in C and Java. Some require a sudden flash of insight or knowledge of good coding style to solve, others demand intimate knowledge of the compilation process. The problems range from easy to insanely tricky. The C brain teasers come from The C Puzzle Book and the Obfuscated C Contest. The Java problems are from the Java Puzzlers book.

It seems that there is some misunderstanding about my previous post. The purpose was never for measuring C++ performance but for better understanding of how polymorphism is implemented in C++, and make people aware that those extra power is not come for free. This is why I choose trivial cases and disable compiler optimization. Trivial cases for make the time penalty observable, disabling compiler optimization for ensure that assembly code is generated from C++ source code directly so it could be easier for analysis. These time penalty actually may not be a problem in real life as a considerable part of the overhead will be eliminated by compiler optimization.

One of the things that I most liked about ActionScript when I first began to use it was how easy it was to pick up after using Java for several years. I have blogged about some of the similarities Java and ActionScript share, but there are also some differences (such as ActionScript's support for switching on Strings). In this brief blog entry, I will demonstrate one subtle difference in behavior in ActionScript from what I am used to from years of C++ and Java experience.

In this tutorial, explore the Eclipse C Development Tooling (CDT) project and how it allows you to work with C- and C++-based projects. Furthermore, learn how to install open source tools to help develop native applications for the iPhone platform on Windows and Linux, and learn about the source code of a basic iPhone application in Objective-C.

Google's Darin Fisher, a software engineer on the Chrome project, talks about how the Web browser was developed and tested. As you might suspect, agility, speed, and testing were all critical.

A little while ago I was asked to make a small circuit based around a microcontroller and a Digital to Analog Converter that would output various sounds corresponding to different stimuli. These stimuli would be commands received by the microcontroller via UART, and the output sounds would simulate a switch, or a closed door, or other ambient sounds from a working environment

Different programming languages have different takes on how to handle I/O. The basic way is to wrap the kernel syscalls, here's the basic open() call in assembler:

Validation is one of the most important parts in any software project. Building flexible business validation is every one’s dream. Rather than writing frameworks from scratch to do these things, Microsoft validation blocks makes it a breeze. In this article we will discuss how validation application blocks help us to build flexible validations using validation application blocks. Its just a simple sixteen step process to put our business validation in action using validation blocks.

With the days of the single cored processor drawing to a close and users demanding more robust user interfaces by the day, knowledge of multi-threaded programming techniques is quickly becoming a requirement of any competitive application developer.

Herb continues his exploration of lock-free code--this time focusing on creating a lock-free queue.

Do you like C? I do. I used to write software for embedded devices, where resources are priceless and each CPU cycle and every byte of RAM counts. I enjoyed it a lot, mostly because it was a real challenge and it reminded me of good old 8-bit computer times, when if your program was not fast enough you had to optimize its code or found a smarter solution instead of buying a better CPU, expanding memory, or building a home data center

There are several traps that even very experienced programmers fall into when they write code that depends on floating point arithmetic. This article explains five things to keep in mind when working with floating point numbers, i.e. float and double data types.

Functions often depend on particular behavioral characteristics (“features”) of code they invoke. For example, thread-safe code must invoke only thread-safe code if it is to remain thread-safe, and exception-safe code must invoke only exception-safe code. This paper describes a technique that enables the specification of arbitrary combinations of user-defined code features on a per-function basis and that detects violations of feature constraints during compilation. The technique applies to member functions (both nonvirtual and virtual), non-member functions, and function templates; operators are excluded.

Bjarne shares his perspective on everything from his favorite toy growing up, to his dream about the future of computing, to his greatest fears about how multicore technology might evolve.

I’ve been playing around with Python a bit lately for a new project. I got up to a stage where I needed image manipulation on a per-pixel level. Here’s a few different approaches I tried out, with performance results and code snippets.

As we know iterators in C++ is a good but not a perfect abstraction. Concept of foreach() (D, Python, Ruby, etc.) appears as more generic solution. At least foreach() does not require artificial iterator::end() to be defined for the collection.

I was recently privy to a conversation where a student in an introductory course on AI was being taught iterative deepening search in, of all things, Scheme. Now I don’t know enough about Scheme to fall one way or another… just as I don’t know enough about Italian to say whether or not the Verdi’s Aida is decent in its original language. (Of course, I don’t know enough Aida to tell you whether it is decent in English either.) However, in a game programming world dominated by C++, I would question the merits of teaching in anything other than C++.

Security is becoming more and more critical to developers in all types of environments—even those such as embedded systems that have until recently considered security a non-issue. In this article, I examine several types of coding vulnerabilities, pointing out what the vulnerability is, how you can mitigate the risk of exploit within your code, and how to best find these types of flaws in your code.

15th October 2008 - Maritim Hotel Stuttgart MISRA DAY 2008 Highlight will be the keynote of Dr. Scott Meyers, the well known C++ expert. The following topics will be discussed: - Presentation of the new MISRA-C++ Standard. - The current status, as well as the further development of MISRA-C - A critical sight into the area of a MISRA-conforme Programming. The MISRA DAY 2008 addresses Software-Engineers, Testers, Quality Managers and Project Managers of companies who are developing Software in C or C++ in Embedded respectively in safety-critical environments. Also the MISRA DAY addresses branches, that don’t have a prescripted Standard for programming guidelines yet, like medical, avionics, railway, etc.

The coding convention all 200 of our engineers use on a daily basis.