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Virtual functions and performance - C++
...places to look for performance improvements are in algorithms and I/O.
An excellent article that talks about virtual functions (and more) is Member Function Pointers and the Fastest Possible C++ Delegates.
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
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This answer is excellent, it really deserves more upvotes considering that firejail is actively maintained with great documentation, encompasses most if not all of the other answers and is designed to be relatively easy to use.
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What is a practical use for a closure in JavaScript?
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The example you give is an excellent one. Closures are an abstraction mechanism that allow you to separate concerns very cleanly. Your example is a case of separating instrumentation (counting calls) from semantics (an error-reporting API). Other uses ...
How to use SVN, Branch? Tag? Trunk?
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The subversion book is an excellent source of information on strategies for laying out your repository, branching and tagging.
See also:
Do you continue development in a branch or in the trunk
Branching strategies
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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...'s inline help:
\h ALTER TABLE
Also documented in the postgres docs (an excellent resource, plus easy to read, too).
ALTER TABLE tablename ADD CONSTRAINT constraintname UNIQUE (columns);
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What exactly is Apache Camel?
...);
}
See also this and this and Camel in Action (as others have said, an excellent book!)
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What is digest authentication?
...sent over the wire.
HA1 = MD5(username:realm:password)
Wikipedia has an excellent article on this topic
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How can I test https connections with Django as easily as I can non-https connections using 'runserv
...ango-extensions
It has dependencies on Werkzeug (so you get access to the excellent Werkzeug debugger) and pyOpenSSL (only required for ssl mode) so to install run:
pip install django-extensions Werkzeug pyOpenSSL
Add it to INSTALLED_APPS in your projects settings.py file:
INSTALLED_APPS = (
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How to add a custom loglevel to Python's logging facility
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@Eric S.
Eric S.'s answer is excellent, but I learned by experimentation that this will always cause messages logged at the new debug level to be printed -- regardless of what the log level is set to. So if you make a new level number of 9, if you call s...
What is the difference between association, aggregation and composition?
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The article is excellent
– ProgrammingHobby
Sep 20 at 17:23
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