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How to sort a dataframe by multiple column(s)
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You can use the order() function directly without resorting to add-on tools -- see this simpler answer which uses a trick right from the top of the example(order) code:
R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A ...
Is it possible to have SSL certificate for IP address, not domain name?
I want my site to use URLs like http://192.0.2.2/... and https://192.0.2.2/... for static content to avoid unnecessary cookies in request AND avoid additional DNS request.
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Difference between Visibility.Collapsed and Visibility.Hidden
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Timertask or Handler
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What does [ N … M ] mean in C aggregate initializers?
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Best ways to teach a beginner to program? [closed]
... helps.
1) FizzBuzz. Start with command line programs. You can write some fun games, or tools, very quickly, and you learn all of the language features very quickly without having to learn the GUI tools first. These early apps should be simple enough that you won't need to use any real debugging to...
how do i do an insert with DATETIME now inside of SQL server mgmt studio
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Show filename and line number in grep output
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Purpose of “consider_all_requests_local” in config/environments/development.rb?
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Should I use PATCH or PUT in my REST API?
...only the activation field(partial modification)
according to the RFC5789 (https://tools.ietf.org/html/rfc5789)
The existing HTTP PUT method only allows a complete replacement of
a document. This proposal adds a new HTTP method, PATCH, to modify
an existing HTTP resource.
Also, in...