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Aggregate / summarize multiple variables per group (e.g. sum, mean)
... x1 x2
1 2000 1 -80.83405 -224.9540159
2 2000 2 -223.76331 -288.2418017
3 2000 3 -188.83930 -481.5601913
4 2000 4 -197.47797 -473.7137420
5 2000 5 -259.07928 -372.4563522
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New self vs. new static
... mleko
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answered Mar 4 '11 at 18:19
BoltClock♦BoltClock
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What is the “FS”/“GS” register intended for?
...egment] register pointer needed!); I did this in an 8 bit OS back in the 1970s and it was extremely handy, like having another big stack of registers to work in.
So, the segment registers are now kind of like your appendix. They serve a vestigial purpose. To our collective loss.
Those that don't k...
What is “missing” in the Visual Studio 2008 Express Editions?
... commercial development - that is not true (Visual Studio Express FAQ Item 7)
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bind event only once
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Tony Hinkle
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answered Dec 7 '11 at 0:25
pnapna
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How to send an email with Python?
... jonchar
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answered Jun 7 '11 at 20:07
EscualoEscualo
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Android; Check if file exists without creating a new one
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Difference between .on('click') vs .click()
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I think, the difference is in usage patterns.
I would prefer .on over .click because the for...
Change the URL in the browser without loading the new page using JavaScript
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edited Apr 7 '14 at 16:35
community wiki
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Javascript library for human-friendly relative date formatting [closed]
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