大约有 5,600 项符合查询结果（耗时：0.0209秒） [XML]
Accessing items in an collections.OrderedDict by index
...omment, I have done a benchmark on OrderedDict and IndexedOrderedDict with 1000 entries.
In [1]: from numpy import *
In [2]: from indexed import IndexedOrderedDict
In [3]: id=IndexedOrderedDict(zip(arange(1000),random.random(1000)))
In [4]: timeit id.keys()[56]
1000000 loops, best of 3: 969 ns per ...
Random number generator only generating one random number
...se static random instance with code such as
StaticRandom.Instance.Next(1, 100);
share
|
improve this answer
|
follow
|
...
Assignment in an if statement
...ld you happen to know why this particular feature has managed to pass the -100 point bar?
– asawyer
Sep 16 '14 at 16:02
3
...
Removing the remembered login and password list in SQL Server Management Studio
...e file C:\Users\%username%\AppData\Roaming\Microsoft\Microsoft SQL Server\100\Tools\Shell\SqlStudio.bin
SQL Server Management Studio 2005 delete the file – same as above answer but the Vista path.
C:\Users\%username%\AppData\Roaming\Microsoft\Microsoft SQL Server\90\Tools\Shell\mru.dat
These ar...
Perl build, unit testing, code coverage: A complete working example
....0 n/a 0.0
D:/Perl/lib/strict.pm 84.6 50.0 50.0 100.0 0.0 73.1
D:/Perl/lib/vars.pm 44.4 36.4 0.0 100.0 0.0 36.2
D:/Perl/lib/warnings.pm 15.3 12.1 0.0 11.1 0.0 12.0
D:/Perl/lib/warnings/register.pm 0.0 0.0...
Selecting multiple columns in a pandas dataframe
...d
import numpy as np
np.random.seed(5)
df = pd.DataFrame(np.random.randint(100, size=(100, 6)),
columns=list('ABCDEF'),
index=['R{}'.format(i) for i in range(100)])
df.head()
Out:
A B C D E F
R0 99 78 61 16 73 8
R1 62 27 30 80 7 76...
Evenly distributing n points on a sphere
...sin(theta) * radius
points.append((x, y, z))
return points
1000 samples gives you this:
share
|
improve this answer
|
follow
|
...
Select 50 items from list at random to write to file
... space efficient for sampling from a
large population: sample(xrange(10000000), 60)
share
|
improve this answer
|
follow
|
...
How to add a Timeout to Console.ReadLine()?
.... But every ReadLine you call sits there waiting for input. If you call it 100 times, it creates 100 threads which don't all go away until you hit Enter 100 times!
– Gabe
Dec 19 '11 at 19:17
...
Comparing arrays in JUnit assertions, concise built-in way?
...
BozhoBozho
539k129129 gold badges10061006 silver badges11101110 bronze badges
...