A printf format reference page (cheat sheet)

Summary: This page is a printf formatting cheat sheet. I originally created this cheat sheet for my own purposes, and then thought I would share it here.

A cool thing about the printf formatting syntax is that the specifiers you can use are very similar, if not identical, between several different languages, including C, C++, Java, Perl, Ruby, and others, so your knowledge is reusable, which is a good thing.

A Ruby Monte Carlo simulation of coin flips

For some reason or another today I was curious about this question: If you flipped a coin ten times, what are the odds that the coin would come up heads ten times, or tails ten times)?

I'm sure there is a way to determine this statistically, but I don't know how to do that, so, being new to Ruby, I wrote a little Ruby simulation program — essentially a Monte Carlo simulation of the problem — to find the answer. (Pretty boring, I know, but hey, I was bored, interested in learning Ruby, and didn't feel like reading any more of The Stand right now.)

Ruby command line arguments

Ruby FAQ: How do I read command line arguments in a Ruby script (Ruby command line args)?

To read command line args in a Ruby script, use the special Ruby array ARGV to get the information you need. Here are a few examples.

1) Getting the number of command line args

To get the number of command line arguments passed in to your Ruby script, check ARGV.length, like this:

Drupal 7 - A Rails-like approach for Drupal form and module development

Looking for a Ruby on Rails like approach for Drupal 7 form and module development? If so, I may have just the tool you're looking for.

As you can see in the video below, I show how I can generate Add, Edit, Delete, and List forms for a Drupal 7 project I'm working on in four minutes, or one minute per form. Of course there's a little more work to be done, but the code-generating approach I've taken is exactly what Ruby on Rails and CakePHP did the last time I used them.

First Mac Ruby Appscript examples

I just took a brief look at Ruby Appscript as a potential replacement for AppleScript on Mac OS X. So far it looks promising, and works on Mac OS X 10.6 (Snow Leopard) just fine.

The hardest part about working with it yet has been finding a few examples to get going with. Based on my forty-five minutes of working with it just now, here are a couple of quick Ruby Appscript examples that might help get you going a little faster.

Regular expression examples (common regex patterns)

Regular expression FAQ: Do you have a list of common regular expression examples, i.e., the most common regex patterns used in programming languages like Java, Perl, PHP, Ruby, and others?

I've been asked several times, so I thought it might be helpful to post some of the most common regular expression examples that are used in programming. Honestly I haven't tested any of these yet -- I did them off the top of my head -- but I think they will work for most open source programming languages.