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TCP: can two different sockets share a port?
...lished connection is uniquely identified by the combination of client-side and server-side IP/Port pairs. Multiple connections on the same server can share the same server-side IP/Port pair as long as they are associated with different client-side IP/Port pairs, and the server would be able to hand...
Share Large, Read-Only Numpy Array Between Multiprocessing Processes
... between 5+ multiprocessing Process objects. I've seen numpy-sharedmem and read this discussion on the SciPy list. There seem to be two approaches-- numpy-sharedmem and using a multiprocessing.RawArray() and mapping NumPy dtype s to ctype s. Now, numpy-sharedmem seems to be the way to g...
How can I profile Python code line-by-line?
I've been using cProfile to profile my code, and it's been working great. I also use gprof2dot.py to visualize the results (makes it a little clearer).
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Algorithm for Determining Tic Tac Toe Game Over
I've written a game of tic-tac-toe in Java, and my current method of determining the end of the game accounts for the following possible scenarios for the game being over:
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Tricky Google interview question
... = 0; // Index for 5
int x2 = 2 * v[i2]; // Next two candidates
int x5 = 5 * v[i5];
for (int i = 1; i != n; ++i)
{
int m = std::min(x2, x5);
std::cout << m << " ";
v[i] = m;
if (x2 == m)
{
++i2;
...
How to map atan2() to degrees 0-360
...
For those not comfortable with this notation, and without the conversion to degrees built in: if(x>0) {radians = x;} else {radians = 2*PI + x;} so we are just adding 2PI to the result if it is less than 0.
– David Doria
Sep 25 '1...
How do I base64 encode (decode) in C?
...
You can skip the libm and math.h "dependency" as well the need for floating point operations (which are slow on some hardware), by using *output_length = ((input_length - 1) / 3) * 4 + 4; in the beginning of base64_encode.
...
How to format a number as percentage in R?
...scales package, as documented in krlmlr's answer. Use that instead of my hand-rolled solution.
Try something like
percent <- function(x, digits = 2, format = "f", ...) {
paste0(formatC(100 * x, format = format, digits = digits, ...), "%")
}
With usage, e.g.,
x <- c(-1, 0, 0.1, 0.5555...
How do I find the time difference between two datetime objects in python?
...nly holds the difference.
In the example above it is 0 minutes, 8 seconds and 562000 microseconds.
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How to determine if a list of polygon points are in clockwise order?
...gth (x2-x1). Notice the sign convention in x. Try this with some triangles and you'll soon see how it works.
– Beta
Jul 27 '09 at 14:20
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