program

A little Scala program to count lines of source code in the Scala Cookbook

As a little mini-project I wanted to count the number of lines of source code in the Second Edition of the Scala Cookbook as compared to the First Edition. To do this I wrote the following Scala program/script to count the lines between the ---- and .... sections in the AsciiDoc files that represent the old and new versions of the book:

A Perl getopts example

Perl getopts FAQ: Can you demonstrate how to use the getopts function? (Also written as, "Can you demonstrate how to read Perl command line arguments?")

MySQL backups: How to backup a MySQL database alvin January 9, 2012 - 9:40am

MySQL database FAQ: How do I backup (back up) a MySQL database?

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:

A simple Arduino Uno LED fade program

Shortly after writing my Arduino Uno Hello, World example, I read my documentation a little more, learned that Pin 9 on the Arduino Uno board is an analog pin, switched the LED wire to that pin, and created the following program, which slowly lights up the LED using an analog programming approach, and then fades the LED light out.

Here's the source code for my LED fade sketch: