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Rolling median algorithm in C
........................................
if __name__ == "__main__":
Len = 10000
window = 3
nlevel = 256
period = 100
np.set_printoptions( 2, threshold=100, edgeitems=10 )
# print medians( np.arange(3), 3 )
sinwave = (np.sin( 2 * np.pi * np.arange(Len) / period )
+ ...
Is gcc std::unordered_map implementation slow? If so - why?
...remember correctly, unordered_map defaults to (smallest prime larger than) 100.
I didn't have chrono on my system, so I timed with times().
template <typename TEST>
void time_test (TEST t, const char *m) {
struct tms start;
struct tms finish;
long ticks_per_second;
times(&am...
What is the significance of 1/1/1753 in SQL Server?
...2
SELECT CONVERT(VARCHAR, DATEADD(DAY,-5,CAST('1752-09-13' AS DATETIME2)),100)
Returns
Sep 8 1752 12:00AM
One final point with the datetime2 data type is that it uses the proleptic Gregorian calendar projected backwards to well before it was actually invented so is of limited use in dealing w...
What's the difference between setWebViewClient vs. setWebChromeClient?
...s you receive from onProgressChanged(WebView, int) is an integer from 0 to 100. If it is 100, you know
that the page is done loading, so you hide the ProgressBar by setting its visibility to View.GONE.
Disclaimer: This information was taken from Android Programming: The Big Nerd Ranch Guide with pe...
What is context in _.each(list, iterator, [context])?
.../ elements less than 5
_.filter(r, lt, 3); // elements less than 3
// add 100 to the elements:
_.map(r, addTo, 100);
// encode eggy peggy:
_.map(words, addTo, "egg").join(" ");
// get length of words:
_.map(words, pluck, "length");
// find words starting with "e" or sooner:
_.filter(words, lt, ...
Evaluating a mathematical expression in a string
...o limit input arguments for a**b:
def power(a, b):
if any(abs(n) > 100 for n in [a, b]):
raise ValueError((a,b))
return op.pow(a, b)
operators[ast.Pow] = power
Or to limit magnitude of intermediate results:
import functools
def limit(max_=None):
"""Return decorator that l...
How can I respond to the width of an auto-sized DOM element in React?
...nst { width, height } = this.props.size;
return (
<svg width="100" height="100">
<circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
</svg>
);
}
}
// Wrap your component export with my library.
export default SizeMe()(MySVG...
Should I use Java date and time classes or go with a 3rd party library like Joda Time?
...lculations. Then you don't have to familiarize yourself with an API of >100 classes, a different formatting/parsing mechanism etc.
Of course, if you do need complete representation of different chronologies (e.g. Hebrew) or wish to be able to define your own imaginary Calendar system (e.g. for ...
Use of var keyword in C#
...
I'd hate to inherit 100k lines of source with no documentation and liberal use of var. Especially if you combine var with less-than-helpful variable names. I could see it being helpful when illustrating a point (or dealing with anonymous types...
Programmer Puzzle: Encoding a chess board state throughout a game
...goal).
In base 10 the number 234 is equivalent to 2 x 102 + 3 x 101 + 4 x 100.
In base 16 the number 0xA50 is equivalent to 10 x 162 + 5 x 161 + 0 x 160 = 2640 (decimal).
So we can encode our position as p0 x 1363 + p1 x 1362 + ... + p63 x 130 where pi represents the contents of square i.
2256 e...