大约有 43,000 项符合查询结果(耗时:0.0442秒) [XML]
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
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answered Dec 2 '11 at 16:42
Jeff HillmanJeff Hillman
6,93033 gold badges2929 silver badges3434 bronze badges
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@UniqueConstraint annotation in Java
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427
To ensure a field value is unique you can write
@Column(unique=true)
String username;
The @...
How do I parallelize a simple Python loop?
...est using the multiprocessing module instead:
pool = multiprocessing.Pool(4)
out1, out2, out3 = zip(*pool.map(calc_stuff, range(0, 10 * offset, offset)))
Note that this won't work in the interactive interpreter.
To avoid the usual FUD around the GIL: There wouldn't be any advantage to using thre...
What are the best JVM settings for Eclipse? [closed]
...romotions/friends-helios/helios.png
After settings for Eclipse Ganymede 3.4.x and Eclipse Galileo 3.5.x, here is an in-depth look at an "optimized" eclipse.ini settings file for Eclipse Helios 3.6.x:
based on runtime options,
and using the Sun-Oracle JVM 1.6u21 b7, released July, 27th (some some...
Get the first element of each tuple in a list in Python [duplicate]
...r x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_list = [x for x,_ in rows]
Below is a demonstration:
>>> lst = [(1, 2), (3, 4), (...
How to force ASP.NET Web API to always return JSON?
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4
where does the first part of the code get cut and pasted too? I don't see a "config" object in my Global.asax. Where is that variable coming...
Is gettimeofday() guaranteed to be of microsecond resolution?
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edited Oct 14 '12 at 12:28
Paul Fleming
22k88 gold badges6262 silver badges104104 bronze badges
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How do you round a floating point number in Perl?
...sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5);...
Creating a UICollectionView programmatically
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WarewolfWarewolf
12.4k44 gold badges5353 silver badges8585 bronze badges
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Understanding typedefs for function pointers in C
...printf() in a signal handler?
So, what have we done here - apart from omit 4 standard headers that would be needed to make the code compile cleanly?
The first two functions are functions that take a single integer and return nothing. One of them actually doesn't return at all thanks to the exit(1);...
