Arrays have many uses and sometimes perl programmers can overuse hashes, but as an ex-Tcl programmer myself I can give the advice to:

1. use hashes when you can
2. when an array is appropriate, use foreach, map and grep. Some perl programmers might overuse map and grep, but when they are good they are VERY good!
3. if you find yourself using an array index ask yourself why - there is almost always a better way in perl

For the enlightenment of non-Tcl people, Tcl has only two types of data. Strings and lists. That's it. Even function calls are just a list where the first list value is the name (string) of a function (or proc) and the rest of the list values are the arguments (which may be, you guessed it, strings or lists).

The lists aren't even very convenient, vis. lsearch.

Don't think I'm bashing Tcl - it's very useful when you need a straightforward embeddable scripting language. You can even make it do very non-trivial things (vis. OpenACS) but it hurts.

upvar anyone?