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Which is more preferable to use: lambda functions or nested functions ('def')?
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108
If you need to assign the lambda to a name, use a def instead. defs are just syntactic sugar f...
How can I time a code segment for testing performance with Pythons timeit?
...when you set its number argument)
import time
def myfast():
code
n = 10000
t0 = time.time()
for i in range(n): myfast()
t1 = time.time()
total_n = t1-t0
In Windows, as Corey stated in the comment, time.clock() has much higher precision (microsecond instead of second) and is preferred over t...
Easy way to test a URL for 404 in PHP?
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101
If your running php5 you can use:
$url = 'http://www.example.com';
print_r(get_headers($url, ...
Creating a new user and password with Ansible
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102
If you read Ansible's manual for user module, it'll direct you to the Ansible-examples github ...
Weighted random numbers
...verkill.
– sellibitze
Nov 19 '09 at 10:02
2
I assume when you say "in order" you are purposely om...
How to avoid explicit 'self' in Python?
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101
Python requires specifying self. The result is there's never any confusion over what's a memb...
When should null values of Boolean be used?
... |
edited May 1 '14 at 10:38
Tiny
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pandas: How do I split text in a column into multiple rows?
...cks ItemExt
0 32363 McCartney, Paul 3 F04 2:218:10:4,6 60
1 31316 Lennon, John 25 F01 1:13:36:1,12 1:13:37:1,13 300
In [44]: s = df['Seatblocks'].str.split(' ').apply(Series, 1).stack()
In [45]: s.index = s.index.droplevel(-1) # to line up with ...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
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1075
Let's say you have a collection of Car objects (database rows), and each Car has a collection...