大约有 16,000 项符合查询结果（耗时：0.0345秒） [XML]
Are static variables shared between threads?
...by another thread, as the JIT is quite within its rights to foist the read into a register and then you'll never see any update. Any eventual load is luck and should not be relied on.
– Jed Wesley-Smith
Feb 8 '11 at 22:24
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What are the differences between numpy arrays and matrices? Which one should I use?
...at the expense of the other,
since np.asmatrix and np.asarray allow you to convert one to the other (as
long as the array is 2-dimensional).
There is a synopsis of the differences between NumPy arrays vs NumPy matrixes here.
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Python multiprocessing pool.map for multiple arguments
...freeze_support
def func(a, b):
print a, b
def func_star(a_b):
"""Convert `f([1,2])` to `f(1,2)` call."""
return func(*a_b)
def main():
pool = Pool()
a_args = [1,2,3]
second_arg = 1
pool.map(func_star, itertools.izip(a_args, itertools.repeat(second_arg)))
if __name__==...
How can I generate a unique ID in Python? [duplicate]
...s:
21.15. uuid — UUID objects according to RFC 4122
eg:
import uuid
print uuid.uuid4()
7d529dd4-548b-4258-aa8e-23e34dc8d43d
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What are carriage return, linefeed, and form feed?
...g CR.) Many text editors can read files in any of these three formats and convert between them, but not all utilities can.
Form feed is a bit more interesting (even though less commonly used directly), and with the usual definition of page separator, it can only come between lines (e.g. after the ...
PHP code to remove everything but numbers
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@Qtax: good point, yeah I know that's where we get the word "grep" from ("g/re/p")
– Chris Eberle
Jul 7 '11 at 0:39
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What does the 'static' keyword do in a class?
...an be one per ClassLoader or AppDomain or thread, but that is beside the point.
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AngularJS routing without the hash '#'
... Never used them, but try this: stackoverflow.com/questions/5840497/convert-htaccess-to-nginx
– bearfriend
Nov 27 '13 at 14:34
3
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Do zombies exist … in .NET?
... begins some procedure after locking on some object, and then is at some point terminated before the lock can be released. This situation has the potential to crash the system, because eventually, attempts to execute that method will result in the threads all waiting for access to an object that wi...
How should equals and hashcode be implemented when using JPA and Hibernate
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When using Hibernate, you could also run into this problem, to which I still haven't found a solution.
– Giovanni Botta
Jul 18 '13 at 19:36
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