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Which, if any, C++ compilers do tail-recursion optimization?
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gcc 4.3.2 completely inlines this function (crappy/trivial atoi() implementation) into main(). Optimization level is -O1. I notice if I play around with it (even changing it from static to extern, the tail recursion goes away pretty fast, so I wouldn't depend on it for...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...and realize that there are a better set of names for my models in my Rails app. Is there any way to use a migration to rename a model and its corresponding table?
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What are the differences between .so and .dylib on osx?
...DLE. They can carry any extension; the extension .bundle is recommended by Apple, but most ported software uses .so for the sake of compatibility. Typically, you'll use bundles for plug-ins that extend an application; in such situations, the bundle will link against the application binary to gain a...
How to create a zip archive of a directory in Python?
...n subpackages as the entry point from a zipped archive.)
Zipping a Python app:
If you have python3.5+, and specifically want to zip up a Python package, use zipapp:
$ python -m zipapp myapp
$ python myapp.pyz
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How to configure encoding in Maven?
...and error the solution described worked. I think that the reason for what happens is because the maven calls the javac of the installed/referred JDK which in turn uses the O/S encoding as default. If someone knows a way to specify the encoding for the javac call in pom.xml would solve this issue in ...
Calculate the center point of multiple latitude/longitude coordinate pairs
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The simple approach of just averaging them has weird edge cases with angles when they wrap from 359' back to 0'.
A much earlier question on SO asked about finding the average of a set of compass angles.
An expansion of the approach re...
Difference between Rebuild and Clean + Build in Visual Studio
...e a link error and let you know that immediately, instead of giving you an app with odd behavior.
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What are the obj and bin folders (created by Visual Studio) used for?
...n folder holds binary files, which are the actual executable code for your application or library.
Each of these folders are further subdivided into Debug and Release folders, which simply correspond to the project's build configurations. The two types of files discussed above are placed into the a...
How do I upgrade PHP in Mac OS X?
...a separate directory, the installer configures Apache so that all your web applications use the newly installed php version. So, the PATH trick is useful only if you run php from the command line. If you want to run web applications the installer takes care of everything.
– fia...
How can I get the domain name of my site within a Django template?
...ramework, you can set a canonical domain name for a Site in the database (mapping the request domain to a settings file with the proper SITE_ID is something you have to do yourself via your webserver setup). In that case you're looking for:
from django.contrib.sites.models import Site
current_site...