Archives for 2008/02 (Blog)

I've been recently spending a significant amount of my free time watching "Buffy the Vampire Slayer" and "Angel" on DVD. I never watched them when they were on the air, but now I'm catching up.

This has earned me accusations of being hypocritical, since I apparently tend to be critical of people who spend (what I consider to be) too much time watching TV.

Well...yes and no. I don't think I'm critical of people who spend a lot of time watching TV. How could I be? I watch a lot of TV myself. I am, on the other hand, critical of people who spend a lot of time channel surfing.

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I just read a very clear tutorial on Perl scoping mechanisms:

http://perl.plover.com/FAQs/Namespaces.html

I often get bitten by scoping issues but unfortunately (or fortunately?) it's usually easier in Perl to work around your problem than to understand the reasons behind it.

One part I found interesting was the section labelled "The Current Package" which explains the use of the package command in Perl. There is a tendency (or, at least, I have a tendency) to conflate the use of the Perl package command and, say, the use of the Java package declaration because they are often used to achieve the same effect, namely the separation of namespaces, and also because, by convention, they are used in a syntactically similar way. Because of this, it is easy to forget that the package command in Perl is just that: a command. You can call it from anywhere, multiple time from the same file even, and the effect is simply to change the current package - which in itself doesn't have a huge effect on how you write your code, just the way to access your variables.

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