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Regex lookahead, lookbehind and atomic groups
...n succeed as s immediately follows in foots, and stop.
Some resources
http://www.regular-expressions.info/lookaround.html
http://www.rexegg.com/regex-lookarounds.html
Online testers
https://regex101.com
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Python extending with - using super() Python 3 vs Python 2
...It is more smart,
super()
is enough in most case. You can refer to http://www.python.org/dev/peps/pep-3135/
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Saving image from PHP URL
I need to save an image from a PHP URL to my PC.
Let's say I have a page, http://example.com/image.php , holding a single "flower" image, nothing else. How can I save this image from the URL with a new name (using PHP)?
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How to generate keyboard events in Python?
...s import CFRelease
from Quartz.CoreGraphics import kCGHIDEventTap
# From http://stackoverflow.com/questions/281133/controlling-the-mouse-from-python-in-os-x
# and from https://developer.apple.com/library/mac/documentation/Carbon/Reference/QuartzEventServicesRef/index.html#//apple_ref/c/func/CGEven...
Extracting text from HTML file using Python
...:
from urllib.request import urlopen
from bs4 import BeautifulSoup
url = "http://news.bbc.co.uk/2/hi/health/2284783.stm"
html = urlopen(url).read()
soup = BeautifulSoup(html, features="html.parser")
# kill all script and style elements
for script in soup(["script", "style"]):
script.extract() ...
Rails: around_* callbacks
I have read the documentation at http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html , but don't understand when the around_* callbacks are triggered in relation to before_* and after_* .
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How to add a custom loglevel to Python's logging facility
... # This method was inspired by the answers to Stack Overflow post
# http://stackoverflow.com/q/2183233/2988730, especially
# http://stackoverflow.com/a/13638084/2988730
def logForLevel(self, message, *args, **kwargs):
if self.isEnabledFor(levelNum):
self._log(level...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
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Copied verbatim from http://cocoaheads.tumblr.com/post/17757846453/objective-c-literals-for-nsdictionary-nsarray-and:
Objective-C literals: one can now create literals for NSArray, NSDictionary, and NSNumber (just like one can create literals fo...
WKWebView not loading local files under iOS 8
...ring just because I wanted to show the work-around here. IMO code shown in https://github.com/shazron/WKWebViewFIleUrlTest is full of unrelated details most people are probably not interested in.
The work-around is 20 lines of code, error handling and comments included, no need of a server :)
func...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
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cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
注意linux生产环境不能安装32位的mongodb，因为32位受限于操作系统最大2G的文件限制。
#解压下载的压缩包
tar xvzf mo...