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Generate random integers between 0 and 9
How can I generate random integers between 0 and 9 (inclusive) in Python?
19 Answers
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Command to escape a string in bash
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How to drop a list of rows from Pandas dataframe?
...positional indexes to drop ([1, 2, 4] in the question).
indexes_to_keep = set(range(df.shape[0])) - set(indexes_to_drop)
df_sliced = df.take(list(indexes_to_keep))
In my case this took 20.5s, while the simple df.drop took 5min 27s and consumed a lot of memory. The resulting DataFrame is the same....
What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
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Undo a git stash
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Well, not quite. It will not reset what is in the staging directory, so you will have to restage all that (which can be annoying if you had just done a complex git add -p
– Nick
Jan 2 '13 at 17:31
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How to create a button programmatically?
...width: 100, height: 50))
button.backgroundColor = .greenColor()
button.setTitle("Test Button", forState: .Normal)
button.addTarget(self, action: #selector(buttonAction), forControlEvents: .TouchUpInside)
self.view.addSubview(button)
}
func buttonAction(sender: UIButton!) {
print("Button ...
What do the terms “CPU bound” and “I/O bound” mean?
...ited by the speed of the CPU. A task that performs calculations on a small set of numbers, for example multiplying small matrices, is likely to be CPU bound.
I/O Bound means the rate at which a process progresses is limited by the speed of the I/O subsystem. A task that processes data from disk, fo...
SQL - Select first 10 rows only?
...S
MS SQL Server
SELECT TOP 10 ...
MySQL
SELECT ... LIMIT 10
Sybase
SET ROWCOUNT 10
SELECT ...
Etc.
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Delete all Duplicate Rows except for One in MySQL? [duplicate]
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How do I parse a YAML file in Ruby?
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