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622 - Queues and barrel rolls in Perl
There are some applications where you want to go round and round a list and one way to do so is to "barrel roll" the list by moving the last element onto the start each time you use an element. That would be complicated in some languages, but in Perl you can simply use a pop followed by an unshift. ....

621 - And the staff put the icing on the cake
I do enjoy taking a ferry in the middle of a long drive. It's a chance to pause, to think, to relax, to eat; I find the "relax" part sadly lacking when I fly. I'm seated in the Cafe on the "European Highlander", outbound from Larne to Cairnryan, and due there just before 10 p.m. There's quite a ....

620 - Familiar names, close to home
Familiar names - Crossmaglan and Hillsborough, Divvis and Falls - all signposted off the road as I drove from Dublin to Belfast to Larne last night - a course ended at Dublin at 4pm with an airport running dropping off a customer for his flight to Copenhagen, then on through Ireland and Northern Ire ....

619 - If its Sunday, it must be the Norland
One of those weeks where I seem to be sleeping in a different bed(room) every day ... and what a contrast. From the height of luxury in London to a nice berth on a ferry ... .... then on to a hotel room, mid-market, Dublin. Tonight, Kilmarnock! Very late arrival ... ....

618 - Perl - its up to YOU to check your file opened
When you open a file in Perl, you should ALWAYS check the return status to see if your open function worked. If it can't open the file you've requested it won't print out an error - the failure is silent unless you check for it. Thus: open (FH,"abc.txt") or die ("Cannot open abc.txt\n"); Perl wil ....

617 - Easy, Free, Reliable internet access
[Written last Sunday morning ... and JUST posted on Wednesday!] Internet access from Well House Manor will be free, easy, and reliable. But accidents do happen and service can be lost. We will go one step further and monitor the service to ensure that we become aware of any problems and can fix the ....

616 - printf - a flawed but useful function
Many languages have printf statements ... and yet from a computer scientist's viewpoint, printf is a flawed function. In order for code to be clean and re-usable, functions should be designed to perform a single task. Alas, printf performs two tasks - it both formats the information that's entered ....

615 - Looking for leading not bleeding edge
When I use a swimming pool, I'm always very conscious of the safety equipment and lifeguards, and also of the other pool users and what they're doing. I have an especial eye for the quiet ones and any places out of common / easy view. Am I odd in this approach when I'm just out for a bit of exercis ....

614 - News in Ireland
Dublin, Ireland, 07:30. The security guard greets me like a long lost friend and asks after the Taxi that I used to drive with a big Well House Consultants logo on the side. I've arrived early for a course - the ferry from Liverpool docked half an hour early at 05:30 and there's - how do I put it ....

613 - Greetings from Dublin
My boat docked early this morning - 05:30 - at Dublin Port and I'm back on line after an absence of 48 hours which is unheard-of for me. Further posting (including some note already waiting on my laptop!) later today. Perl course starts in about 10 minutes ... I'm all set up and ready to go! ....

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