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Counting DISTINCT over multiple columns
...were int's (32b) then a "lossless hash" could combine them into an bigint (64b) like Id1 << 32 + Id2.
– crokusek
Jan 31 '14 at 19:35
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Adding VirtualHost fails: Access Forbidden Error 403 (XAMPP) (Windows 7)
...trying to achieve the same thing in MAMP stackoverflow.com/q/40405663/4480164
– cyber8200
Nov 3 '16 at 15:52
ONLY Opti...
How do I make an HTML text box show a hint when empty?
...s supported by all current browsers except IE8.
– JSP64
Jun 9 '15 at 1:37
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How to get an MD5 checksum in PowerShell
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Algorithm: MD5
Path :
HashString : E42B054623B3799CB71F0883900F2764
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Composer Warning: openssl extension is missing. How to enable in WAMP
Trying to install Composer dependency management tool on Win7/64 + WampServer 2.2 via the Setup Installer and I am getting the following message:
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How do I render a partial of a different format in Rails?
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64
What's wrong with
render :partial => '/foo/baz.html.erb'
? I just tried this to render a...
What does “while True” mean in Python?
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Dagg NabbitDagg Nabbit
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pinterest api documentation [closed]
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64
I want to offer an update on the current status of the Pinterest API.
There is still no public...
How to git commit a single file/directory
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Lily BallardLily Ballard
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Is R's apply family more than syntactic sugar?
...an be substantial, like when you have to nest for-loops to get the average based on a grouping of more than one factor. Here you have two approaches that give you the exact same result :
set.seed(1) #for reproducability of the results
# The data
X <- rnorm(100000)
Y <- as.factor(sample(lett...