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How to git commit a single file/directory
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Understanding CUDA grid dimensions, block dimensions and threads organization (simple explanation) [
How are threads organized to be executed by a GPU?
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postgres: upgrade a user to be a superuser?
...rmana
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answered May 25 '12 at 15:46
QuassnoiQuassnoi
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DistutilsOptionError: must supply either home or prefix/exec-prefix — not both
...hisbe
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answered Jun 23 '14 at 1:35
ayvazjayvazj
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Why does changing 0.1f to 0 slow down performance by 10x?
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Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
Denormal (or subnormal) numbers are kind of a hack to get some extra values very close to zero out of the floating point representation. Operations on denormalized f...
URLEncoder not able to translate space character
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answered Jan 19 '11 at 16:37
dogbanedogbane
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How do I position one image on top of another in HTML?
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Craigo
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answered Jan 4 '10 at 3:40
rrichterrrichter
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Looping through a hash, or using an array in PowerShell
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Drop data frame columns by name
...n use a simple list of names :
DF <- data.frame(
x=1:10,
y=10:1,
z=rep(5,10),
a=11:20
)
drops <- c("x","z")
DF[ , !(names(DF) %in% drops)]
Or, alternatively, you can make a list of those to keep and refer to them by name :
keeps <- c("y", "a")
DF[keeps]
EDIT :
For those still ...
case-insensitive list sorting, without lowercasing the result?
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answered Apr 22 '12 at 16:36
user25148user25148
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