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SQL Server dynamic PIVOT query?
I've been tasked with coming up with a means of translating the following data:
7 Answers
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Difference between numpy.array shape (R, 1) and (R,)
In numpy , some of the operations return in shape (R, 1) but some return (R,) . This will make matrix multiplication more tedious since explicit reshape is required. For example, given a matrix M , if we want to do numpy.dot(M[:,0], numpy.ones((1, R))) where R is the number of rows (of co...
Maximum concurrent Socket.IO connections
...he way: http://drewww.github.io/socket.io-benchmarking/
I wondered the same question, so I ended up writing a small test (using XHR-polling) to see when the connections started to fail (or fall behind). I found (in my case) that the sockets started acting up at around 1400-1800 concurrent connecti...
Get exception description and stack trace which caused an exception, all as a string
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How to change the default GCC compiler in Ubuntu?
...ions will be called.
It is used to maintain different versions of the same software on a system. In your case, you will be able to use several declinations of gcc, and one will be favoured.
To figure out the current priorities of gcc, type in the command pointed out by @tripleee's comment:
upda...
How to use Swift @autoclosure
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Consider a function that takes one argument, a simple closure that takes no argument:
func f(pred: () -> Bool) {
if pred() {
print("It's true")
}
}
To call this function, we have to pass in a closure
f(pred: {2 > 1})
// "It's true"
If w...
Which characters are valid/invalid in a JSON key name?
Are there any forbidden characters in key names, for JavaScript objects or JSON strings? Or characters that need to be escaped?
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String output: format or concat in C#?
...ne as it's probably few orders of magnitude slower than what I'm trying to measure.
2. I'm starting the Stopwatch before the loop and stopping it right after, this way I'm not losing precision if the function takes for example 26.4 ticks to execute.
3. The way you divided the result by some iterati...
Generate a Hash from string in Javascript
I need to convert strings to some form of hash. Is this possible in JavaScript?
22 Answers
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Match whitespace but not newlines
I sometimes want to match whitespace but not newline.
6 Answers
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