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C# Thread safe fast(est) counter
...o (x64).
This "bus lock" statement locks the bus to prevent another CPU from accessing the bus while the calling CPU does its operation. Now, take a look at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() statemen...
Stopping python using ctrl+c
... the python exception hierarchy and only catch exceptions that are derived from Exception.
#This is the wrong way to do things
try:
#Some stuff might raise an IO exception
except:
#Code that ignores errors
#This is the right way to do things
try:
#Some stuff might raise an IO exception
excep...
ssl_error_rx_record_too_long and Apache SSL [closed]
...ight on the money for me. It suggested changing the virtual host tag, ie, from <VirtualHost myserver.example.com:443> to <VirtualHost _default_:443>
Error code: ssl_error_rx_record_too_long
This usually means the implementation of SSL on your server is not correct. The error is...
How do you get the magnitude of a vector in Numpy?
...nner1d. Here's how it compares to other numpy methods:
import numpy as np
from numpy.core.umath_tests import inner1d
V = np.random.random_sample((10**6,3,)) # 1 million vectors
A = np.sqrt(np.einsum('...i,...i', V, V))
B = np.linalg.norm(V,axis=1)
C = np.sqrt((V ** 2).sum(-1))
D = np.sqrt((V*V)...
How to replace a set of tokens in a Java String?
... constructors and set methods.
Variable values are typically resolved from a map, but could also be
resolved from system properties, or by supplying a custom variable
resolver.
For example, if you want to substitute system environment variable into a template string,
here is the code:
pu...
Passing an array by reference
...mp; x[100]); is parsed as "array of references" please? Is it because the "from-right-to-left" rule? If yes, it seems to be not consistent with how void foo(int (&x)[100]); is parsed as "a reference to a array". Thanks in advance.
– zl9394
Feb 11 '17 at 0:5...
endsWith in JavaScript
... lastIndexOf scans all the string? I thought it would search from the end to the beggining.
– Tom Brito
Apr 19 '11 at 16:45
...
Capitalize the first letter of both words in a two word string
...
The base R function to perform capitalization is toupper(x). From the help file for ?toupper there is this function that does what you need:
simpleCap <- function(x) {
s <- strsplit(x, " ")[[1]]
paste(toupper(substring(s, 1,1)), substring(s, 2),
sep="", collapse=" ")
}...
Code for Greatest Common Divisor in Python [closed]
...
It's in the standard library.
>>> from fractions import gcd
>>> gcd(20,8)
4
Source code from the inspect module in Python 2.7:
>>> print inspect.getsource(gcd)
def gcd(a, b):
"""Calculate the Greatest Common Divisor of a and b.
U...
git update-index --assume-unchanged on directory
... | xargs -0 git update-index --assume-unchanged
Edit: incorporated input from @MatthewScharley regarding git ls-files -z.
Windows Commands
Note: If you're on windows, use Git Bash to run these commands
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