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In vim, how do I get a file to open at the same line number I closed it at last time?
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There is a plugin called vim-lastplace (I am the author) that will open your files where you left off. It improves on the above suggestions by ignoring commit messages because you're typically editing a new message and want to start at the top...
Is it possible to set a number to NaN or infinity?
...with a quip before reading the question over a second time!! Sorry! That said, it wouldn't hurt to say so all the same because it's an easy trap to fall into, NaN != NaN
– David Heffernan
Mar 25 '11 at 22:30
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How can I trim leading and trailing white space?
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Ad 1) To see white spaces you could directly call print.data.frame with modified arguments:
print(head(iris), quote=TRUE)
# Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1 "5.1" "3.5" "1.4" "0.2" "setosa"
# 2 "4.9" ...
How to “test” NoneType in python?
...ylicultor downsides to your suggestion: 1. global look-up for type 2. then calling it 3. then looking up the type of None - when None is both a singleton and a keyword. Another downside: 4. this is very non-standard and will raise eyebrows when people are looking at your code. x is None is a more op...
How do I find the width & height of a terminal window?
...onmental variables should be able to do the trick. The will be set automatically upon any change in the terminal size. (i.e. the SIGWINCH signal)
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Remove columns from dataframe where ALL values are NA
... 1e6), sample(c(1:8,NA),1e6,T), sample(250,1e6,T)),simplify=F)
bd <- do.call(data.frame,big_data)
names(bd) <- paste0('X',seq_len(30))
DT <- as.data.table(bd)
system.time({df1 <- bd[,colSums(is.na(bd) < nrow(bd))]})
# error -- can't allocate vector of size ...
system.time({df2 <- ...
Checking if object is empty, works with ng-show but not from controller?
...items have value
} else {
// items is still null
}
And in your $http callbacks, you do the following:
$http.get(..., function(data) {
$scope.items = {
data: data,
// other stuff
};
});
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Relatively position an element without it taking up space in document flow
...and, you can, however, make a pseudo-relative element, by creating a zero-width, zero-height, relatively positioned element, essentially solely for the purpose of creating a reference point for position, and an absolutely positioned element within that:
<div style="position: relative; width: 0; ...
how to mysqldump remote db from local machine
...local server
Remore server
CREATE USER 'backup_remote_2'@'192.168.0.102' IDENTIFIED WITH caching_sha2_password BY '3333333' REQUIRE SSL;
GRANT ALL PRIVILEGES ON *.* TO 'backup_remote_2'@'192.168.0.102';
FLUSH PRIVILEGES;
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Local server
sudo /usr/local/mysql/bin/mysqldump \
--databases test_...
How do DATETIME values work in SQLite?
I’m creating Android apps and need to save date/time of the creation record. The SQLite docs say, however, "SQLite does not have a storage class set aside for storing dates and/or times" and it's "capable of storing dates and times as TEXT, REAL, or INTEGER values".
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