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3069 - Strings, Garbage Collection and Variable Scope in C++
In C, you'll handle strings as arrays of chars (type char *) and that does work - but with grumbles from the compiler about deprecation - in C++. The more modern (or shall we say "more OO") approach is to handle strings as objects - and those will be objects of type string, with headers loaded via ....

3068 - Throwing your own exception in C++, and catching it
In C++ you can throw anything - it doesn't have to be something "throw-able" as in Java. 1. Create a class of objects that you want to throw in exceptional circumstances 2. When you want to throw an exception, use the throw keyword and pass in the object 3. Call the code that you want to catch the ....

3067 - Using C and C++ functions in the same program - how to do it
If you have some native C functions that you want to include in your C++, can you do so? The answer is a - slightly reserved - yes. Firstly, you need to have your main program in C++ rather than being one of the C elements. Then you need both the C and C++ compilers to be from the same family / ....

3066 - Separating groups of variables into namespaces
If your program's going to grow in size beyond a certain point, you'll need to use some sort of namespace or package to segment global names into different groupings - moving from a single name to a forename / surname type system, if you like to think of it that way. In C++, it's namespaces - see [ ....

3065 - Pictures from the Birkenhead to Belfast crossing
Trying a new route - the DFDS boat from Birkenhead to Belfast, for a two day course in Antrim ... train to Birkenhead (Hamilton Square) and then the ferry overnight to Belfast. Taxi to the bus station (there seems to be a complete lack of public transport connections for foot passengers to ferries t ....

3064 - On the way to the course this week
Just a picture from this evening ... the beauty of engineering even in the evening. If you click on the image, you'll see it larger ....

3063 - Comments in and on Perl - a case for extreme OO programming
"The only thing that will interpret Perl is a Perl interpreter" ... how those words rang in my ears this morning as I was writing some code to highlight source code comments in a different colour in our web site examples. The words were spoken by Larry Wall ... I think it was 10 years ago, so I ma ....

3062 - Melksham Carnival - getting ready for 2011
"Carnival in November?" you ask. Yes - the Melksham Carnival Committee is looking forward to 16th July 2011, and early on Friday morning the lady who's going to be looking after their web site popped in for breakfast and to be shown the ropes. And I'm delighted to see that - by Saturday morning - ....

3061 - Databases - why data is split into separate tables, and how to join them
If you're travelling from Chippenham to London by train, you may want to grab a quick coffee at the station before you set off - and where better than Steamers? And if you were traveling to Plymouth, Bristol, Southampton, Llandrindod Wells or Cheltenham, you would use Steamers too. Let's assume I ....

3060 - INSERT, DELETE, REPLACE and UPDATE - changing the content of SQL tables
Most enquires of an SQL database are SELECTs - most database are "Read Mostly" and writes are limited to a small proportion of accesses (though there are exceptions). And SELECTs are much more complex that things that insert or change data too. However, I found myself writing en example on yester ....

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