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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
...iltin_clz (unsigned int x)
Returns the number of leading 0-bits in X, starting at the most
significant bit position. If X is 0, the result is undefined.
-- Built-in Function: int __builtin_clzl (unsigned long)
Similar to `__builtin_clz', except the argument type is `unsigned
l...
When should I use a composite index?
...e PARTITIONs are stripes of latitude ranges. The PRIMARY KEY deliberately starts with longitude so that the useful rows are likely to be in the same block. A Stored Routine orchestrates the messy code for doing order by... limit... and for growing the 'square' around the target until you have enou...
Find a Git branch containing changes to a given file
...n all 57 branches contain a change which includes that filename. Branches start from the oldest revision reachable on that branch, even if that revision existed before you created the branch (the branch is in some senses retroactively created). I think you need to define your problem better. Do y...
What kind of virtual machine is BEAM (the Erlang VM)?
...he number of threads and on which cores they run can be set when the VM is started.
Erlang processes are implemented entirely by the Erlang VM and have no connection to either OS processes or OS threads. So even if you are running an Erlang system of over one million processes it is still only one ...
HTML5 Canvas vs. SVG vs. div
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To add to this, I've been doing a diagram application, and initially started out with canvas. The diagram consists of many nodes, and they can get quite big. The user can drag elements in the diagram around.
What I found was that on my Mac, for very large images, SVG is superior. I have a M...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
...stgres, then finally 3) easily switch to Rabbit as your broker. Seems like starting with Rabbit is pre-optimizing.
– Joe
Sep 16 '13 at 19:30
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What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?
...ss you'd like to locate and the root directory path where you'd like it to start searching for the class in jars and zip files.
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YouTube iframe API: how do I control an iframe player that's already in the HTML?
...el he does not want to use the autoplay-url parameter. Instead he tries to start the video by using the js-APIs autoplay function. But for some reason the onYouTubeIframeAPIReady() function is not invoked.
– Humppakäräjät
Feb 4 '15 at 18:21
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Argparse: Required arguments listed under “optional arguments”?
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Parameters starting with - or -- are usually considered optional. All other parameters are positional parameters and as such required by design (like positional function arguments). It is possible to require optional arguments, but this...
How to use a WSDL
... They sent me the WSDL file.
What should I do to add it to my website and start using it as the proxy.
( If I put it on a Virtual Directory it can be discovered, but does it grant me the connection with the real web service?)
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