[perl-python] 20050116 defining a function

[Xah Lee]

errata:

* the variables in the perl section should be declared inside the
subroutine.
* the @_[0] should've been $_[0]

thanks for Dave Cross for pointing them out.

* the Mathematica Apply should be Select...
Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html