Fireside Chat


Tonight I signed up for the Fireside beta. They asked for all my social media accounts to prove I'm a human. The problem is, I don't have a twitter account, a facebook account, instagram, etc. Years ago I took the advice of numerous psychology studies and my own therapist's advice and got off the social media platforms. It was one of the best things I've ever done for my mental health.

So hopefully this blog, though infrequently updated (and slightly broken since the last major perl update), will serve as proof to the people at Fireside that I am human and not a bot.

It was the Astonishing Legends Podcast that led me to Fireside. It would be nice to use it for one of their interactive live chats sometime.

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Lincoln Park Triathlon


Registration for the 2012 Lincoln Park Triathlon is now open. If anyone is interested in volunteering, please email volunteers@lincolnparktriathlon.com.

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FreeBSD 7 SATA Weirdness
Over the weekend I installed the x86-64 build of FreeBSD 7 on my workstation, dib. I haven't had time yet to configure everything to my liking yet, but almost everything works.

The one really annoying issue centers around a SATA DVD burner. When this device is attached to the primary SATA controller (ICH7), the system refuses to boot from the hard drive. It reports that no system disk has been found. I've tried all of the SATA settings options in the BIOS and none work.

If I connect the SATA burner to the secondary Marvell "RAID" controller the system boots from the hard drive without issue. In Windows, this requires another driver (which for some reason installed a copy of apache along with it). Under FreeBSD 7; however, this second controller seems to be currently unsupported, leaving me with only the IDE burner available.

I may spend the $20 and get another IDE burner and just forget about the SATA issue, but I really would like to know what the problem is. If any one has any idea why the system would fail to boot from a SATA hard drive when a SATA optical drive is attached, please email me and give me some insight into this issue. Maybe the Unix category wasn't the best for this. I spent more time discussing the hardware/BIOS weirdness than the installation or configuration of FreeBSD7. In fact, FreeBSD 7 isn't a very good title for this either. I'm going to change that.

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When will I realize...
I've been running for 3 years 6 months and 9 days. I've been 100 pounds lighter* for 2 years 9 months and 3 days. And I still don't feel like this is my body.

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He's Not Wrong...
Over at Net Meister there's a nice peice entitled Things They Don't Teach You in School". A lot of what Jan has to say is spot-on observation and good advice.

It's definitely worth a read.

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Looking back...
As I look back at code I wrote a decade ago as an undergrad, I often find lots of little things that can be done better. For instance, in one file I found that reversing the order in which two functions were called would have eliminated a half dozen conditionals from one of the functions and would have resulted in the same expected behavior, but with fewer lines of code and a lower cyclomatic complexity.

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Thoughts on National Computer Science Education Week
This week is apparently National Computer Science Education Week. Code.org is organizing the "hour of code" to promote teaching of Computer Science and Programming in schools. They're also organizing petitions to make CS courses count as credits in Mathematics or Science for High School graduation requirements.

In High School, my CS courses were by far my favorites, Programming in Pascal, AP Comp Sci in Pascal, Programming in C++, and AP Comp Sci in C++ ( the language for the exam switched my junior year). I learned a lot about structured code, elegant, efficient code. I learned enough about Data Structures and Algorithms that I didn't have to study for my college CS classes until Computational Structures (Discrete Math II with Scheme, essentially) in my third semester. I had an amazing Computer Science teacher who also taught me Calculus and the proper order of precedence in life: God, Family, Math. I wouldn't be where I am today without that educational opportunity I had in High School. I want others to have that opportunity too.

However, this is where I differ with the opinion of the Code.org folks. I do not believe that CS classes should count toward the Math or Science requirements. In this state, CS counts toward the "practical or performing art" requirements, I'm assuming under the "practical" label. I think this is a better place for it at the High School level.

Computer Science is not a hard Science. It's not Physics. It's not Biology. It's not Chemistry. There's a saying that if the subject has science in its name, it's not really a science. That is true with Computer Science. It's not studying the how and why of atoms, of molecules, of living systems, of anything really. It's not science.

Computer Science is really applied mathematics. I am very fortunate that the college program I went through was very strong in mathematics: Calc I and II, Linear (Matrix) Algebra, Discrete Math, Discrete Math II in the guise of Computational Structures, Probability and Statistics, Theory of Computation, Algorithmic Analysis... the list goes on. All of these mathematical foundations were then applied to a machine, to make the machine carry out a task in an efficient manner. It's those mathematical foundations that are the true core of Computer Science.

While mathematics is the core of Computer Science and Computer Science is essentially applied mathematics, I do not believe it should count toward the Math requirements. The CS classes would likely detract from other mathematics courses such as Geometry, Trigonometry, and Calculus. These courses are far too important to an education to be replaced by a Computer Science course. Many, maybe even most, High School Computer Science courses focus more on "programming" than the fundamental mathematical theories. They will pick the language du jour and teach you the syntax and semantics. They'll teach about basic data structures like arrays, and linked lists. The AP exam currently focuses not on implementing lists, trees, stacks, queues, and sorting and searching algorithms, but on arrays and lists using Java library calls. This is not math. This is learning Java syntax.

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unHide
After a friend's computer became infected with some malware that hides files in your home directory and tries to extort money from you in order to "recover" your data, I was inspired to write this little program.

All it does is search for hidden, non-system files and unhides them. It defaults to the user's home directory (My Documents), but other directories can be chosen.

If anyone wants to try it out, please do. If you do try it, let me know what parts I can do better. I primarily work on embedded systems and Unix daemons professionally; the user only knows my software exists when it isn't working. As such, I have very little experience with GUIs or human-computer interactions. Any feedback would be much appreciated.

The Windows executable can be found at: http://www.skinnymf.com/~mforde/unHide/. Source code is available upon request.

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Just a Question
Given the following code fragment, I was asked to implement foo such that the program would output "America." How would you do it?

        int main()
        {
          char *p = "Hello";

          foo(         );
          printf("%s",p);

          return 0;
        }

My solution involved allocating new memory from the heap to store the new string, and changing p to point to that buffer. They didn't like that answer. They preferred the method of putting the new string in the data segment as well.

I personally would always avoid that, whenever possible. "Hello" is stored in a read-only area of memory as is "America" in their preferred solution. Any attempt to alter those strings will trigger a segfault. This is an accident waiting to happen.

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It's not magic, it's C.
I love reading comments like

/* These defined magically in the linker script. */

I found that in the GNU Standard C Library implementation when GCC told me the the variables to which the comment referred were undefined. I guess that linker script isn't magic after all...

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C#, XNA, and 8 Queens
I spent some time this weekend learning some C# and getting working a bit with the XNA framework. I implemented a solution for the 8 Queens problem in C++, then ported that class to C#. After getting that working in Windows, I started moving it to the Xbox.

It works there with little issue, but, as expected, writing to system.console doesn't produce useful output. My next step is to get some sort of graphical representation of the chessboard displayed with the solution set.

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XNA
As of this morning, I am now a member of the XNA Creators Club.

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Self Documenting Code
Despite what you think about your code, it is not self documenting. When writing code add comments, describe what a function does, explain why you're using that convoluted pointer arithmetic and bit shifting. I'm sure it makes sense now, but someday you'll have to go back and look at it and figure out what the hell you were doing. Or worse, I'll have to go back and look at it and figure out what the hell you were doing.

Sometimes it is important to have some sort of separate documentation for the code; maybe some UML or ER diagrams, maybe some English text. Use what ever it takes to explain what you were doing. Do not paste snippets of your code into the text and call it documentation.That is not documentation, that is code.

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New Vernon Coach and Motor Works is Awesome
For as long as I've been a DeLorean owner, I've been taking the car to New Vernon Coach and Motor Works. They have always been professional and courteous, and they have always done top-notch work. I highly recommend them.

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How to Make VMWare suck less Tip #273
Find the .vmx file for your VM and add a line

bios.bootDelay = "15000"

That gives you 15 seconds before the virtual machine launches the boot loader, giving you plenty of time to do things like change the boot order so you start from a recovery CD.

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The new phone book is here!
I am now officially 5% rockstar. At least I am according to the New York Times. I am now the proud owner of DeLorean #6291 manufactured in November of 1981.

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How to Drive a Classic Rolls-Royce, or a DeLorean, Any Time You Want
Bloomberg has posted an article entitled How to Drive a Classic Rolls-Royce, or a DeLorean, Any Time You Want. It's really quite simple, actually. You take your keys, go out the the garage, and you drive the DeLorean any time you want.

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