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str performance in python
...time.
>>> import dis
>>> dis.dis(lambda: str(100000))
8 0 LOAD_GLOBAL 0 (str)
3 LOAD_CONST 1 (100000)
6 CALL_FUNCTION 1
9 RETURN_VALUE
>>> dis.dis(lambda: '%s' % 100000)
...
How to remove specific elements in a numpy array
...specific question:
import numpy as np
a = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9])
index = [2, 3, 6]
new_a = np.delete(a, index)
print(new_a) #Prints `[1, 2, 5, 6, 8, 9]`
Note that numpy.delete() returns a new array since array scalars are immutable, similar to strings in Python, so each time a c...
How can I obtain the element-wise logical NOT of a pandas Series?
...ean Series, use ~s:
In [7]: s = pd.Series([True, True, False, True])
In [8]: ~s
Out[8]:
0 False
1 False
2 True
3 False
dtype: bool
Using Python2.7, NumPy 1.8.0, Pandas 0.13.1:
In [119]: s = pd.Series([True, True, False, True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, bes...
Why is === faster than == in PHP?
...|
edited Nov 11 '19 at 5:58
Lucas
36411 gold badge66 silver badges1212 bronze badges
answered Mar 8 '10 ...
What is the significance of ProjectTypeGuids tag in the visual studio project file
...
{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} is the GUID for C# project
{60dc8134-eba5-43b8-bcc9-bb4bc16c2548} is for project in WPF flavor package
So your ProjectTypeGuids is for a WPF C# project.
You could see the meaning of the different GUID in the register :
HKEY_LOCAL_MACHINE\SOFTWARE\Micro...
Detect IE version (prior to v9) in JavaScript
...
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html class="lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html class="lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html...
Any way to force strict mode in node?
...|
edited Nov 16 '16 at 7:48
answered Jan 7 '13 at 18:14
Cha...
Optional query string parameters in ASP.NET Web API
... frapontillofrapontillo
9,9511111 gold badges3838 silver badges5353 bronze badges
...
How to parameterize @Scheduled(fixedDelay) with Spring 3.0 expression language?
...
answered Apr 8 '10 at 19:08
Grzegorz OledzkiGrzegorz Oledzki
20k1414 gold badges6060 silver badges9393 bronze badges
...
Restore file from old commit in git
...
228
git checkout 'master@{7 days ago}' -- path/to/file.txt
This will not alter HEAD, it will just ...