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C++ “virtual” keyword for functions in derived classes. Is it necessary?
...rence between them other than that the first approach requires more typing and is potentially clearer.
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Unioning two tables with different number of columns
I have two tables (Table A and Table B).
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How to determine whether a given Linux is 32 bit or 64 bit?
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Try uname -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you w...
How to display length of filtered ng-repeat data
...Angular prior to 1.3
Assign the results to a new variable (e.g. filtered) and access it:
<div ng-repeat="person in filtered = (data | filter: query)">
</div>
Display the number of results:
Showing {{filtered.length}} Persons
Fiddle a similar example. Credits go to Pawel Kozlowski
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How do you deal with configuration files in source control?
Let's say you have a typical web app and with a file configuration.whatever. Every developer working on the project will have one version for their dev boxes, there will be a dev, prod and stage versions. How do you deal with this in source control? Not check in this file at all, check it with diffe...
How to upgrade all Python packages with pip?
...finite potential variations for this. I'm trying to keep this answer short and simple, but please do suggest variations in the comments!
In older version of pip, you can use this instead:
pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
The grep is to skip editable...
How can I detect when an Android application is running in the emulator?
... development server automatically.) What is the best way to detect when an Android application is running in the emulator?
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Ruby on Rails production log rotation
...ted setups
config.logger = SyslogLogger.new
That way, you log to syslog, and can use default logrotate tools to rotate the logs.
Option 2: normal Rails logs + logrotate
Another option is to simply configure logrotate to pick up the logs left by rails.
On Ubuntu and Debian that would be, for ex...
plot with custom text for x axis points
I am drawing a plot using matplotlib and python like the sample code below.
2 Answers
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HTTP redirect: 301 (permanent) vs. 302 (temporary)
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Status 302 means that the resource is temporarily located somewhere else, and the client/browser should continue requesting the original url.
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