Dave Smith's Blog

The iPhone doesn’t (easily) let you change the colors of your calendar items. Couple this with the fact that there are lots of ways to setup calendar sync’ing, and it’s easy to get discouraged.

For me, my work calendar and my personal calendar both showed up as nearly the same shade of red. Fail.

Here’s how I fixed it. This only works if you have the following situation:

• iPhone OS 3.0 or newer
• Using Google Calendar with CalDAV (not Exchange)
• Note: I use Exchange for my work calendar and Google for my personal calendar, and I want them both on my iPhone with different colors

Steps to change the color (this takes about 5 minutes if nothing goes wrong).

1. Open iCal on your Mac (don’t have a Mac? Maybe Mozilla Sunbird can do this too)
2. Subscribe to your Google Calendar (instructions to do this
3. In the sidebar, notice your new calendar appears
   
4. Right-click on the new calendar and select Get Info
5. Now change the color to what you want
   
6. Do nothing, and in a couple minutes your iPhone calendar items will have the new color

If you can’t get iCal setup, don’t fret. It does work. Double check your URL you typed to subscribe to your Google Calendar. Don’t forget the “/user” at the end. Follow Google’s instructions (see link above) very closely.

Good luck!

I’ve recently seen some confusion about the terms functional and procedural in the software development community. Let me spend a moment trying to clear things up for (both of) my readers.

First of all, just because a programming language has functions, that does not mean it is functional. In fact, its confusing name has nothing to do with functions. The history of the term function, as used in the computation world, hails back to the 1930′s when Alonzo Church created Lambda Calculus to be able to use and define mathematical algorithms on paper. Later, when computers arrived on the scene, programmers adopted the term function to describe a chunk of code that could be re-used by other chunks of code. Functions, in this context, have been adopted by every programming language I know of, including assembly language. Functions are commonly referred to as “routines”, “subroutines”, or “procedures”. Some might even argue that a “method” is pragmatically identical to a function.

Here’s where the confusion begins.

This is hard to explain rigorously, but here goes anyway.

Some languages, like C, tend to encourage computer programmers to make use of functions. Programs written in these languages tend to consist of a set of functions, and a “main” function that kicks everything off. Such a language is often referred to as “procedural”, but really the term “procedural” refers to a style of programming, and does not really describe a language, per se. It is most often used as an antonym to the concept of “object oriented”. But, oddly, it has nothing to do with “functional” programming.

Other languages, like Scheme and Haskell, tend to encourage computer programmers to write code with functions that avoid internal state changes and produce no side effects when called. For example, these language discourage global variables, and particularly the calling of functions that would mutate global variables (that would be a side effect).

To sum up.

Procedural programming languages can be functional or not. Functional programming languages can be procedural or not.

Here’s a table:

If you take nothing else away from this article, take this: The C programming language is not a functional language. It’s not bad, it’s just not functional.

My brain’s been a stewing about 2010, and I just gotta let it all out. If I’m even half right, 2010 will be awesome.

1. Hulu in the Living Room

In 2010, Hulu will partner with a company like Western Digital or Popcorn Hour to release a tiny box that connects to your HDTV to watch TV shows and movies, streamed from Hulu’s servers. The box will cost less than $100, and have no monthly subscription, because its development will be subsidized by Hulu’s ad revenues. If it’s not released in 2010, it will at least be announced.

2. Cable Networks Become Record Labels

Just like iTunes changed the music industry, online media and broadband Internet access will start to change the TV industry. It remains to be seen who will be the big player (my money’s on Hulu), but one thing is for sure: Americans will have a choice when it comes to buying subscription TV services. The trend will begin in 2010, allowing consumers to get on-demand TV content for free, and will finish some time in the future with cable companies either totally transforming into something like modern record labels, or going out of business.

3. HDTV Sales Will Boom

HDTV’s have gotten so inexpensive that nearly every American household will have one by the end of 2010. This will be driven by the fact that online media will be so easily accessible that most people won’t need to buy cable, so they can easily justify the cost of a new $500 TV.

4. Qt’s Best Year

Companies who develop desktop application software that needs to run on Mac and Windows will simply have no other choice for their developers than Qt. That trend will strengthen in 2010 to the point that it’s a no-brainer decision over platform-specific choices like .NET, Cocoa, and others. Qt has matured so much over the last 5 years that its toe-hold in this market will grow to a full Nelson in 2010.

5. Model Aviation Takes Off

Model airplanes have gotten very popular and accessible. Manufacturers have pushed prices down so low that anyone can afford to get into the hobby. Batteries, R/C electronics, and planes have gotten cheaper, and planes have gotten easier to fly for the novice pilot. The entry-level model airplane market will take off in 2010.

Your Turn

Do you agree with my predictions, or am I totally off?

Have any predictions of your own?