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2238 - Handling nasty characters - Perl, PHP, Python, Tcl, Lua
Are your writing or maintaining a web based application that uses forms? If so, you have better be aware of some of the nasty characters that are around! The < character, when echoed back from a users's input 'unchallenged', may form the start of a tag. So that in a relatively benign case, a u ....

2237 - Taking a pride in the community
How do you encourage young people to take a pride in their community, rather than engaging is antisocial behaviour? By encouraging their inclusiveness and by providing them with facilities. Lisa and I took a short train trip yesterday, and found ourselves at the station with eye-catching silhouet ....

2236 - Alumni - revisiting and supporting the old University
I have just completed a survey for my old university - I won't name them here, but researchers will be able to find out who they are easily enough, as I made a comment and recommended one of their courses - which actually competes to some extent with what we do - in a comparison chart here recently, ....

2235 - Sending awkward characters by email in Perl
Carrying on from the email work I described in a recent article, I wrote an example today in Perl where I used the mailx program to send an email, piping to it in a system call via an echo. For a one-liner, without special characters in the text, this is easy ... but to get echo to pass through all ....

2234 - Loading external code into Perl from a nonstandard directory
Here's a piece of Perl code that loads in an external module. push(@INC, "/var/opt/OV/bin/OpC/monitor"); eval { require "monitor_utils.pm"; }; if ($@) {   print STDERR "could not load monitor_utils.pm: $@\n";   exit 1; } It comes from a delegate's existing application, and is w ....

2233 - Transforming data in Perl using lists of lists and hashes of hashes
In Perl, you don't have conventional two dimensional arrays - you have lists which are single dimensional only. However, you can have a list that contains a reference to another list, in effect a list of lists. Very powerful stuff as it leads to a very flexible way of handling data structures - we ....

2232 - Why sendmail one way, and pop3 the other?
When you send emails, you'll use a "sendmail" protocol / service, whereas when you receive them, you'll typically use a "pop3" or similar protocol / service. Why not use just one protocol for all the stages of email transmission? Well in sendmail protocol, the client program pushes the email to a ....

2231 - What is CGI.pm / A dozen new examples
Perl's CGI.pm module allows both a structured and Object Oriented approach to generating and handling web pages via the Common Gateway Interface. It was written (a long time ago now) to provide a library of routines to help Perl programmers write web applications without having to (re)write or roll ....

2230 - Running a piece of code is like drinking a pint of beer
Q: What is the effect when I drink a pint of beer? A: I get slightly tipsy. But that's too simplistic! A: The brewery has some more money A: There's a glass to wash up A: I need the loo! Running a piece of code is like drinking a pint of beer - as well as a headline result, you get extra variabl ....

2229 - Do not re-invent the wheel - use a Perl module
"If you think 'surely someone has done this before', you're probably right ... and in Perl, you'll find the resource you need available as a module on your system, or if it's not quite to common, on the CPAN". I was reminded of this advise today, when I got involved with web site checking ... and ....

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