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How do you set, clear, and toggle a single bit?
... behaviour to shift by more than the width of a long. The same applies to all the rest of the examples.
Clearing a bit
Use the bitwise AND operator (&) to clear a bit.
number &= ~(1UL << n);
That will clear the nth bit of number. You must invert the bit string with the bitwise NOT op...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...
Finally! Following up leads in sdcvvc's answer, we have it: the O(n log n) algorithm for the problem! It is simple too, after you understand it. Those who guessed FFT were right.
The problem: we are given a binary string S of l...
Visual Studio can't build due to rc.exe
...exe and rcdll.dll to visual studio 2012\vc\bin or wherever you have it installed:
Part 2: FIX LINK : fatal error LNK1158: cannot run ‘rc.exe’
Add this to your PATH environment variables:
C:\Program Files (x86)\Windows Kits\8.0\bin\x86
Copy these files:
rc.exe
rcdll.dll
From
...
How do I create a self-signed certificate for code signing on Windows?
... -a sha256 -cy authority -sky signature -sv MyCA.pvk MyCA.cer
(^ = allow batch command-line to wrap line)
This creates a self-signed (-r) certificate, with an exportable private key (-pe). It's named "My CA", and should be put in the CA store for the current user. We're using the SHA-256 al...
How can I create a self-signed cert for localhost?
...
I followed all these steps and I'm getting a ERR_SSL_VERSION_OR_CIPHER_MISMATCH in Chrome 60 and Safari 10.1.2 doesn't like it either.
– styfle
Aug 5 '17 at 21:19
...
jekyll markdown internal links
...ou can now post internal links by using the following:
[Some Link]({% post_url 2010-07-21-name-of-post %})
This is also referenced in the Jekyll Documentation.
https://github.com/mojombo/jekyll/pull/369
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Matplotlib (pyplot) savefig outputs blank image
...values that depend whether or not T0 exists.
Second, after plt.show() is called, a new figure is created. To deal with this, you can
Call plt.savefig('tessstttyyy.png', dpi=100) before you call plt.show()
Save the figure before you show() by calling plt.gcf() for "get current figure", then you ca...
Error installing mysql2: Failed to build gem native extension
I am having some problems when trying to install mysql2 gem for Rails. When I try to install it by running bundle install or gem install mysql2 it gives me the following error:
...
Changes in import statement python3
...a single function. In Python 2 you were permitted to be semi-lazy:
def sin_degrees(x):
from math import *
return sin(degrees(x))
Note that it already triggers a warning in Python 2:
a.py:1: SyntaxWarning: import * only allowed at module level
def sin_degrees(x):
In modern Python 2 co...
What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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