大约有 40,000 项符合查询结果（耗时：0.0709秒） [XML]
More elegant “ps aux | grep -v grep”
...
brilliant hack (I think I should call it that, since the aux / grep authors probably did not think of this scenario.)
– Michael Trouw
Apr 12 '16 at 14:12
...
Should I use scipy.pi, numpy.pi, or math.pi?
...gt;> math.pi == np.pi == scipy.pi
True
So it doesn't matter, they are all the same value.
The only reason all three modules provide a pi value is so if you are using just one of the three modules, you can conveniently have access to pi without having to import another module. They're not provi...
What is __init__.py for?
...kages as they existed in Python 3.2 and earlier. A regular package is typically implemented as a directory containing an __init__.py file. When a regular package is imported, this __init__.py file is implicitly executed, and the objects it defines are bound to names in the package’s namespace. The...
Concrete Javascript Regex for Accented Characters (Diacritics)
...oesn't follow the Unicode standard concerning RegExp , etc.) and haven't really found a concrete answer to the question:
9 ...
How to stop /#/ in browser with react-router?
... Note that history is a stand-alone package you'll need to install.
– Jan Klimo
Oct 24 '15 at 15:01
4
...
With Git, how do I turn off the “LF will be replaced by CRLF” warning
...input and core.eol input. Or just don't let git change the line endings at all with autocrlf false and get rid of highlighting of crlfs in diffs, etc with core.whitespace cr-at-eol.
Hope this helps
share
|
...
Git Ignores and Maven targets
Anyone know if it is possible to ignore all the instances of a particular directory in a file structure managed by git.
5 ...
Why is the .bss segment required?
...Imagine that your C program runs on an embedded system, where the code and all constants are saved in true ROM (flash memory). In such systems, an initial "copy-down" must be executed to set all static storage duration objects, before main() is called. It will typically go like this pseudo:
for(i=0...
When is the thread pool used?
... it completes the work, and the listener then returns the response to the caller.
4 Answers
...
SQLAlchemy: Creating vs. Reusing a Session
Just a quick question: SQLAlchemy talks about calling sessionmaker() once but calling the resulting Session() class each time you need to talk to your DB. For me that means the second I would do my first session.add(x) or something similar, I would first do
...