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2414 - Hello World - a good traditional start to a Java course
All programming courses, it seems, start with a "Hello World" program. It's almost a tradition and while I'm not one of those people who follows traditions just for their sake, traditions usually are founded on good reason. This one is, and we follow it! When you come new to a programming language ....

2413 - Sanity checking the price, and selling up to increase income
"Does that LOOK right?" It's a question I always ask myself before I present a critical piece of information - such as a bill - to someone. The sanity checking in this was is something which was taught to me (and taught well, because it has stuck and is useful) many years ago when learning to use ....

2412 - Autumn Fruits and Bristol Old Station
Where can we go today? There's a wide choice of places on offer ... ... some of which have a chequered and interesting history (and those of you who know something about your history of Bristol will recognise that this covered car park was once the gateway to the City But it's autumn, and i ....

2411 - Further North - long summer days and lovely countryside
I live further north than the city of Moose Jaw, Saskatchewan at 50°37' [Latitude]. And much further north than Ottawa, where I was cautioned against walking 400 yards to a restaurant in deep winter because of the bitter cold. Ottawa is at 45°24'. Where I live is 51°32' North. Living ....

2410 - Removal of technical resources from this site
"Will you ever be removing any of these resources?" A question asked in all seriousness by a delegate on the course I was concluding in Friday, as he looked through the huge range of pages we have here. I'm not a politician, so I can answer a question simply - the answer is "No - I can't see circ ....

2409 - TypeError: super() argument 1 must be type, not classobj (Python)
If you've got an error message like this, you've called up a method from the base class of your object using "new style classes", but the base class is an "old style class". The full error message looks something like this: Traceback (most recent call last):   File "cl_n.py", line 24, i ....

2408 - Robust user input (exception handling) example in Python
One of the questions in the "exceptions" section of the Python Course asks my delegates to "Graham Proof" a piece of code: first = int(input("First number: ")) second = int(input("Second number: ")) print "Sum is "+str(first+second) The idea is that I come round the room and put really awkward i ....

2407 - Testing code in Python - doctest, unittest and others
The doctest and unittest modules of Python allow you to provide test harnesses for your classes / packages. Designing applications from the bottom up, you'll want to ensure that each of your code levels works and works well. You'll want to provide an example of what it should do for the next leve ....

2406 - Pound Sign in Python Program
How do I get a pound sign up in Python? A regular question ans the regular answer is to use a unicode string: >>> saying = u'It will cost \u00a310.00' >>> print saying It will cost £10.00 >>> Which is all well and good, but people want to be able to type the pound sign into the source code ....

2405 - But I am reading from a file - no need to prompt (Perl)
If you're writing a script that calls for user input, you had better prompt the user ... otherwise, the terminal / window will appear to hang and the user won't know what's going on. However - if you're reading your answers from a pre-prepared file or piping them in from another process, all of th ....

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