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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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Where is this year() function from?
You could also use the reshape2 package for this task:
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Value of type 'T' cannot be converted to
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edited Jul 21 '11 at 15:41
answered Nov 3 '10 at 22:57
SL...
How to test chrome extensions?
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answered May 24 '10 at 18:44
KinlanKinlan
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What are naming conventions for MongoDB?
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Keep'em short: Optimizing Storage of Small Objects, SERVER-863. Silly but true.
I guess pretty ...
How to print the current Stack Trace in .NET without any exception?
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408
Have a look at the System.Diagnostics namespace. Lots of goodies in there!
System.Diagnostic...
How to convert std::string to LPCWSTR in C++ (Unicode)
... Toran BillupsToran Billups
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How to download Xcode DMG or XIP file?
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You can find the DMGs or XIPs for Xcode and other development tools on https://developer.appl...
Difference between GIT and CVS
... numbers (as you can see sometimes in keyword expansion, see below) like 1.4 reflects how many time given file has been changed. In Git each version of a project as a whole (each commit) has its unique name given by SHA-1 id; usually first 7-8 characters are enough to identify a commit (you can't us...
Difference between jQuery parent(), parents() and closest() functions
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Amit Shah
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answered Feb 8 '12 at 12:35
SubashSubash
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How to supply value to an annotation from a Constant java
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answered Jan 14 '10 at 21:57
irreputableirreputable
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