大约有 6,800 项符合查询结果（耗时：0.0217秒） [XML]
How to count the number of true elements in a NumPy bool array
... bools = np.random.uniform(size=1000) >= 0.5" "np.count_nonzero(bools)" vs. python -m timeit -s "import numpy as np; bools = np.random.uniform(size=1000) >= 0.5" "sum(bools)"
– chbrown
Nov 19 '13 at 21:10
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Declare slice or make slice?
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Can i say the same for map? var m map[string]int vs m:= make(map[string]int) ? Thanks.
– joshua
Mar 6 '15 at 7:46
11
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What's the difference between struct and class in .NET?
...ssions, iterator blocks, and the already mentioned boxed values. But stack vs heap allocation is a implementation detail and may be subject to change. Eric lippart discusses this here. I've downvoted, but will happily remove it if you update.
– Simon P Stevens
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Difference between return and exit in Bash functions
... Thanks Mike S, yeah I agree that the simplest example best explains exit vs return. The other comments are certainly valid, and should be considered for more advanced bash coders ;-)
– Mike Q
Oct 13 '16 at 13:46
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NameError: global name 'xrange' is not defined in Python 3
...hat you are doing, most likely there will be more problems beyond xrange() vs. range().
For the record, what you are seeing is not a syntax error but a runtime exception instead.
If you do know what your are doing and are actively making a Python 2 codebase compatible with Python 3, you can brid...
(-2147483648> 0) returns true in C++?
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community wiki
15 revs, 2 users 99%qPCR4vir
3
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How does the following LINQ statement work?
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This is called deferred execution.
-- Suprotim Agarwal, "Deferred vs Immediate Query Execution in LINQ"
There is another execution called Immediate Query Execution, which is useful for caching query results. From Suprotim Agarwal again:
To force immediate execution of a query that doe...
What does a just-in-time (JIT) compiler do?
...tion needs that is required codes are only converted to machine code.
JIT vs Non-JIT comparison:
In JIT not all the code is converted into machine code first a part
of the code that is necessary will be converted into machine code
then if a method or functionality called is not in machine then th...
Recommendations of Python REST (web services) framework? [closed]
... This is incorrect, Django has full support for recognizing POST vs GET and limiting views to only certain methods.
– aehlke
Jul 23 '09 at 14:18
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How to generate service reference with only physical wsdl file
... service WSDL and hit go:
2. To create it via the command line:
Open a VS 2010 Command Prompt (Programs -> Visual Studio 2010 -> Visual Studio Tools)
Then execute:
WSDL /verbose C:\path\to\wsdl
WSDL.exe will then output a .cs file for your consumption.
If you have other dependencies th...