There are two canonical acronyms for Perl: “Practical Extraction and Report Language” and “Pathologically Eclectic Rubbish Lister”. Arguably, Perl can be both.
Vlinder Software announces Arachnida version 2.2
Vlinder Software is announcing the release of version 2.2 of Arachnida, our HTTP server framework for embedded devices. This version introduces two important features: a hardened, more versatile OpenSSL plug-in: we’ve scrapped the plug-in that was originally created for version … Continue reading
Qt to quickly write a GUI app
Today, my wife asked me to write an app that would tell her to sit straight every 15 minutes. I know apps like that already exist and I could’ve pointed her to one, but I decided to write one myself. The result is tannez-moi (which is French for “bother me”).
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The benefits of formal, executable specifications
While a specification should not specify the C++ code that should be implemented for the specified feature, it should specify the feature in a verifiable manner. In some cases, formal — and even executable — specifications can be of great help.
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Why #fixthathouse?
Those of you who follow me on Twitter might wonder why, all of a sudden, I started tweeting assertions with the #fixthathouse hashtag. The reason is simple, CBC The House made me do it.
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Run-time composed predicates and Code generation
While working on Arachnida, preparing version 2.2 due out this fall, one of the things we’ll be introducing is a hardened OpenSSL transport-layer-security plug-in, to replace the one we’ve had for the last seven or so years. One of the new features in this plug-in (which is part of Arachnida’s “Scorpion” module) is a much more flexible configuration scheme including the subject of today’s post: run-time composed predicates.
Posted in C & C++, C++ for the self-taught, Software Design
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Common nonsense: the charter of Quebec Values
Four of these need not apply for a government job in Quebec if the new PQ charter of values becomes law. Can you pick the one that might still get the job?
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Sometimes, your right hand should know what your left hand is doing
Posted in C & C++, Software Development
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Conditional in-place merge algorithm
Say you have a sorted sequence of objects.
Go ahead, say: “I have a sorted sequence of objects!”
Now say it’s fairly cheap to copy those objects, you need to be space-efficient and your sequence may have partial duplicates — i.e. objects that, under some conditions, could be merged together using some transformation.
OK, so don’t say it. It’s true anyway. Now we need an algorithm to
- check for each pair of objects in the sequence whether they can be transformed into a single object
- apply the transformation if need be
Let’s have a look at that algorithm.
