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1306 - Python class rattling around
"Occupany Limit 230" says the room that I'm running my Python training course - for 8 delegates - in at the Watervliet Arsenal near Albany, New York State this week. Watervliet is being "demilitarised", which means that there's a whole lot of commercial companies - including the one I'm teaching - ....

1305 - Regular expressions made easy - building from components
There seems to be a certain macho desire in many programmer's minds to write a single complicated regular expression to match against an input line, ignorning the structured approach that everyone accepts quite cheerfully in almost every other case. Have a look at this Python line: wholeline = r"\ ....

1304 - Last elements in a Perl or Python list
How do we refer to the elements of a list? By index number, starting at zero and stopping one short of the number of elements in the list. So a 20 element list has element numbers 0 to 19. How can we refer to the last element, then? We could write an expression based on the length of the list - ....

1303 - Heading Upstate New York
A bridge over the Hudson, from the Albany train We met Linda - probably not her real name - on the railroad up from New York to Albany on Sunday. She boarded the crowded train behind us, and, looking for a seat, sat opposite us in one of the four seat bays, with a polite "may I sit here?". A qu ....

1302 - Ruby, Ruby, Ruby. Rails, Rails, Rails.
We passed through New York on our way up from Washington DC to Albany, NY State; a 3-hour layover gave us a chance for a quick meal (there's no better city for a choice of foods), and a chance to look through a book store (there's no better country to look through the shelves for the next trend). ....

1301 - Plastic or China
"Do you use Plastic or China?" A question asked by Lisa's brother who manages a major, lotta-stars, hotel in Roanoke, VA - the Hotel Roanoke. It's a good question, relating to the cups and glasses in the hotel's bedrooms. We've stayed there, "Chez Phil" on a previous trip and, yes, it is a spect ....

1299 - In the USA for a few days
A long day yesterday - 24 hours long - from Melksham to Franconia Springfield in Virginia, USA. There'a a long and somewhat negative report elsewhere on our site, which was written mid - journey; 01:15 UK time, and we still had an Amtrak journey, 2 metros and a taxi to negotiate! At Bristol Airp ....

1298 - From Leeds
3 years back, Leeds was a City that I knew little of and had hardly even visited, but recently I've found myself up here several times and I'm almost getting to know my way around. I happen to be starting to the South of the major public transport interchange, and the city centre's to the North - ....

1297 - Stuffing content into a web page - easy maintainance
All the pages on the main section of this web site are generated by some sort of program - a Perl script that we call "mksite" for page which are essentially static and are generated in batches from a template each time we do an update, and PHP scripts for the more dynamic pages ... although actuall ....

1296 - An example of Java Inheritance from scratch
One of the most important topics for newcomers to OO (Object oriented) programming to learn is how to design their classes and make best use of inheritance, and I find myself writing new examples from first principles during our courses. That way, the delegates learn how to actually do the job - the ....

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