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How to convert a factor to integer\numeric without loss of information?
...ge varhandle
unfactor(your_factor_variable)
This example can be a quick start:
x <- rep(c("a", "b", "c"), 20)
y <- rep(c(1, 1, 0), 20)
class(x) # -> "character"
class(y) # -> "numeric"
x <- factor(x)
y <- factor(y)
class(x) # -> "factor"
class(y) # -> "factor"
lib...
What is an SSTable?
...hrough the cassandra code; the only call is mlockall(MCL_CURRENT); done at startup. See also: goo.gl/AEgPM
– ithkuil
Apr 18 '12 at 17:03
4
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Why is nginx responding to any domain name?
...e. Also, many distributions run an 'nginx -t' to test the config before restarting - you may have an error preventing a restart.
– jwhitlock
Dec 12 '13 at 21:10
2
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CAP theorem - Availability and Partition Tolerance
...: (Linearizability or strong consistency) roughly means
If operation B started after operation A successfully completed, then
operation B must see the system in the same state as it was on
completion of operation A, or a newer state (but never old state).
A:
“every request received b...
How to use Active Support core extensions
...ire all libs that you use all the time. It will load them automatically on start. I.E. I use awesome_print, hirb and some custom methods all the time - so I just put them there and don't have to think twice for things like 1.hour.ago or ap {:a => 3, :b => "nick"} to work.
...
Specifically, what's dangerous about casting the result of malloc?
Now before people start marking this a dup, I've read all the following, none of which provide the answer I'm looking for:
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How do I push a local Git branch to master branch in the remote?
...rposes, especially for git newcomers. Clean "topic branches" is the way to start, you can optimize your workflow later on if needed.
– Eugene Sajine
Jul 10 '12 at 17:57
1
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How to close off a Git Branch?
I'm starting out using Git + GitHub.
3 Answers
3
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How does the vim “write with sudo” trick work?
...-to-use: just type :w!!.
" Allow saving of files as sudo when I forgot to start vim using sudo.
cmap w!! w !sudo tee > /dev/null %
The > /dev/null part explicitly throws away the standard output, since, as I said, we don't need to pass anything to another piped command.
...
Stop Excel from automatically converting certain text values to dates
...postal codes
telephone numbers
government ID numbers
which sometimes can start with one or more zeroes (0), which get thrown away when converted to numeric. Or the value contains characters that can be confused with mathematical operators (as in dates: /, -).
Two cases that I can think of that the...