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Group by multiple columns in dplyr, using string vector input
...:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the columns we want to average within
columns = names(data)[-3]
library(dplyr)
df1 <- data %>...
How should I choose an authentication library for CodeIgniter? [closed]
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Update (May 14, 2010):
It turns out, the russian developer Ilya Konyukhov picked up the gauntlet after reading this and created a new auth library for CI based on DX Auth, following the recommendations and requirements below.
And the resulting...
Multi-line string with extra space (preserved indentation)
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10 Answers
10
Active
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Keep ignored files out of git status
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hamid k
35422 silver badges1010 bronze badges
answered Nov 30 '09 at 10:21
MBOMBO
27k55 gold badges4646 s...
An error occurred while signing: SignTool.exe not found
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Yes, this worked for me in Windows10. In Control Panel I've updated the installation to include CickOnce Publishing Tools and it worked! Thank you.
– Nuno Nogueira
Nov 24 '15 at 17:48
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Configure IIS Express for external access to VS2010 project
I am developing a project in VS2010 and am able to view my site locally via IIS Express. I would like to enable external access over the network.
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Common CSS Media Queries Break Points [duplicate]
...8 / ...
– Miguel Moura
May 9 '13 at 10:46
9
As I mentioned, if you try to chase screen sizes you'...
REST API Best practices: Where to put parameters? [closed]
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answered Oct 26 '10 at 23:33
Darrel MillerDarrel Miller
126k2828 gold badges179179 silver badges234234 bronze badges
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The requested operation cannot be performed on a file with a user-mapped section open
...xt window in the editor.
– Harv
Apr 10 '13 at 19:07
3
DLL open as a tab in VS too! Thank you!
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Why there is no ConcurrentHashSet against ConcurrentHashMap
...the lookups are slower.
– eckes
Jun 10 '15 at 15:44
4
take care when using this approach, since s...