大约有 44,000 项符合查询结果（耗时：0.0540秒） [XML]
How can I recover the return value of a function passed to multiprocessing.Process?
...xample shows how to use a list of multiprocessing.Pipe instances to return strings from an arbitrary number of processes:
import multiprocessing
def worker(procnum, send_end):
'''worker function'''
result = str(procnum) + ' represent!'
print result
send_end.send(result)
def main()...
Why are Where and Select outperforming just Select?
...e execution of where+select vs select with same results.
static void Main(string[] args)
{
int total = 10000000;
Random r = new Random();
var list = Enumerable.Range(0, total).Select(i => r.Next(0, 5)).ToList();
for (int i = 0; i < 40000...
log4j vs logback [closed]
... improvements like in example Log4j 2 operates with bytestreams instead of Strings under the hood. Also it doesn't loose events while reconfiguring.
Log4j 2 can log with higher speed than other frameworks I know: http://www.grobmeier.de/log4j-2-performance-close-to-insane-20072013.html
And still t...
Python __call__ special method practical example
...es a version of the hashlib.foo methods that hash entire files rather than strings:
# filehash.py
import hashlib
class Hasher(object):
"""
A wrapper around the hashlib hash algorithms that allows an entire file to
be hashed in a chunked manner.
"""
def __init__(self, algorithm...
Django Rest Framework File Upload
...r case 2) you can have a single key called data and send the whole json as string in value.
The first method would work out of the box if you have simple fields, but will be a issue if you have nested serializes. The multipart parser wont be able to parse the nested fields.
Below i am providing t...
Type hinting a collection of a specified type
...thon 3 type annotations to specify types within collections (ex: a list of strings).
The use of formatted docstrings such as reStructuredText or Sphinx are viable alternatives and supported by various IDEs.
It also appears that Guido is mulling over the idea of extending type annotations in the sp...
How to add a border just on the top side of a UIView
...r borders = [UIView]()
@discardableResult
func addBorder(formats: String...) -> UIView {
let border = UIView(frame: .zero)
border.backgroundColor = color
border.translatesAutoresizingMaskIntoConstraints = false
addSubview(border)
addConstraints(for...
How to change the author and committer name and e-mail of multiple commits in Git?
...'Newname'; GIT_COMMITTER_EMAIL='new@email';" HEAD
With linebreaks in the string (which is possible in bash):
git filter-branch -f --env-filter "
GIT_AUTHOR_NAME='Newname'
GIT_AUTHOR_EMAIL='new@email'
GIT_COMMITTER_NAME='Newname'
GIT_COMMITTER_EMAIL='new@email'
" HEAD
...
How to append something to an array?
How do I append an object (such as a string or number) to an array in JavaScript?
30 Answers
...
How to install trusted CA certificate on Android device?
...n the actual java now):
public static void installTrustedRootCert( final String certAddress ){
WebView certWebView = new WebView( instance_ );
certWebView.loadUrl( certAddress );
}
Note that instance_ is a reference to the Activity. This works perfectly if you know the url to the cer...