大约有 48,000 项符合查询结果（耗时：0.0482秒） [XML]
Reverse a string in Python
...
@Tanner [::-1] is fastest because it does not call any external functions, rather it's using slicing, which is highly-optimized in python. ''.join(list(reversed(s))) makes 3 function calls.
– hd1
Apr 27 at 13:51
...
This type of CollectionView does not support changes to its SourceCollection from a thread different
...); but it is giving syntax error. Look like Send method is expecting some callback method name. I have tried various options like delegate with parameter but it is not allowing to have my custom parameter. I am very new to this kind of syntax, so it would really helpful if you can provide me synta...
NUnit Test Run Order
By default nunit tests run alphabetically. Does anyone know of any way to set the execution order? Does an attribute exist for this?
...
Reading a huge .csv file
...
You are reading all rows into a list, then processing that list. Don't do that.
Process your rows as you produce them. If you need to filter the data first, use a generator function:
import csv
def getstuff(filename, criterion):
with ...
How do I access command line arguments in Python?
...
Python tutorial explains it:
import sys
print(sys.argv)
More specifically, if you run python example.py one two three:
>>> import sys
>>> print(sys.argv)
['example.py', 'one', 'two', 'three']
share
...
Are there legitimate uses for JavaScript's “with” statement?
...ous as to how I might make effective use of with , while avoiding its pitfalls.
31 Answers
...
How do Python's any and all functions work?
I'm trying to understand how the any() and all() Python built-in functions work.
8 Answers
...
What is the proper way to comment functions in Python?
Is there a generally accepted way to comment functions in Python? Is the following acceptable?
10 Answers
...
jasmine: Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL
I have an angular service called requestNotificationChannel :
17 Answers
17
...
Add custom messages in assert?
...rk; they’re compile-time constants and their use in this context is trivially optimized away. There is no runtime cost.
– zneak
Aug 9 '19 at 8:46
...