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How do you calculate log base 2 in Java for integers?
I use the following function to calculate log base 2 for integers:
10 Answers
10
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What are the GCC default include directories?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I generate random alphanumeric strings?
...hen the call to .Next() will return the same value as Random() uses a time based seed.
– Dan Rigby
Sep 30 '13 at 18:16
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How to detect if app is being built for device or simulator in Swift
...t if app is being built for device or simulator in Swift
Previous Answer
Based on @WZW's answer and @Pang's comments, I created a simple utility struct. This solution avoids warning produced by @WZW's answer.
import Foundation
struct Platform {
static var isSimulator: Bool {
return ...
Quit and restart a clean R session from within R?
...xec which would normally be used to open a file in the default application based on file type. When used on a .exe, apparently, it runs the executable. The important difference, though, is that the system starts the application in it's own separate context. So here's the code that works for me:
mak...
How to show all shared libraries used by executables in Linux?
...tput (for just the /bin directory) will look something like this:
1 /lib64/libexpat.so.0
1 /lib64/libgcc_s.so.1
1 /lib64/libnsl.so.1
1 /lib64/libpcre.so.0
1 /lib64/libproc-3.2.7.so
1 /usr/lib64/libbeecrypt.so.6
1 /usr/lib64/libbz2.so.1
1 /usr/lib64/libelf.so.1
1 /usr/lib64/libpopt...
Generate a heatmap in MatPlotLib using a scatter data set
...rom pip (see webpage documentation). Consider the following code, which is based on the example:
import numpy as np
import numpy.random
import matplotlib.pyplot as plt
import sphviewer as sph
def myplot(x, y, nb=32, xsize=500, ysize=500):
xmin = np.min(x)
xmax = np.max(x)
ymin = np....
Best way to obfuscate an e-mail address on a website?
...
A lightweight way to obfuscate the href of an anchor is to base64-encode it:
> btoa('mailto:email@example.com')
< "bWFpbHRvOmVtYWlsQGV4YW1wbGUuY29t"
And then include it hardcoded:
<a href="javascript:window.location.href=atob('bWFpbHRvOmVtYWlsQGV4YW1wbGUuY29t')">E-Mai...
maximum value of int
... trivially extended for unsigned types:
// We can use it to define limits based on actual compiler built-in types also:
#define INT_MAX SIGNED_MAX(int)
// based on the above, we can extend it for unsigned types also:
#define UNSIGNED_MAX(x) ( (SIGNED_MAX(x)<<1) | 1 ) // We reuse SIGNED_MA...
Visual Studio 64 bit?
Is there any 64 bit Visual Studio at all? Why not?
5 Answers
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