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What's the equivalent for eclipse's ALT+UP/DOWN (move line) in Visual Studio?
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142
In Visual Studio 2013 and later, this functionality is built in. ALT + UP/DOWN will move a lin...
Excluding directories in os.walk
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edited Sep 7 at 13:13
FLASH3G
333 bronze badges
answered Nov 8 '13 at 13:10
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Reliable timer in a console application
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edited Dec 24 '19 at 10:19
Kolappan N
1,83322 gold badges2323 silver badges2727 bronze badges
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Drop data frame columns by name
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You can 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]
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How to cast/convert pointer to reference in C++
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214
Call it like this:
foo(*ob);
Note that there is no casting going on here, as suggested in yo...
Recursive directory listing in DOS
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answered Mar 4 '10 at 4:06
Michael ToddMichael Todd
15.5k44 gold badges4646 silver badges6969 bronze badges
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ERROR: permission denied for sequence cities_id_seq using Postgres
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edited Apr 13 '17 at 12:26
simbo1905
4,69811 gold badge3838 silver badges6666 bronze badges
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Creating a expressjs middleware that accepts parameters
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157
function HasRole(role) {
return function(req, res, next) {
if (role !== req.user.role) r...
Confusion between factor levels and factor labels
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131
Very short : levels are the input, labels are the output in the factor() function. A factor ha...