大约有 44,900 项符合查询结果(耗时:0.0687秒) [XML]
Animate visibility modes, GONE and VISIBLE
...
|
edited May 23 '17 at 12:26
Community♦
111 silver badge
answered Oct 2 '11 at 7:20
...
What are the advantages of NumPy over regular Python lists?
...n lists -- a list of lists as you describe, in Python, would take at least 20 MB or so, while a NumPy 3D array with single-precision floats in the cells would fit in 4 MB. Access in reading and writing items is also faster with NumPy.
Maybe you don't care that much for just a million cells, but you...
Difference between Django's annotate and aggregate methods?
...jects.annotate(num_authors=Count('authors'))
>>> q[0].num_authors
2
>>> q[1].num_authors
1
q is the queryset of books, but each book has been annotated with the number of authors.
share
|
...
Sharing src/test classes between modules in a multi-module maven project
...
2 Answers
2
Active
...
self referential struct definition?
...
|
edited Feb 26 '09 at 4:17
Jonathan Leffler
641k111111 gold badges777777 silver badges11481148 bronze badges
...
grep output to show only matching file
...
|
edited Mar 12 '13 at 22:54
Vincent Scheib
12.4k66 gold badges5252 silver badges7373 bronze badges
...
Why does sed not replace all occurrences?
...
2 Answers
2
Active
...
Is there a method that works like start fragment for result?
...
LeffelManiaLeffelMania
12.1k33 gold badges2929 silver badges3434 bronze badges
...
Normalizing mousewheel speed across browsers
...
Edit September 2014
Given that:
Different versions of the same browser on OS X have yielded different values in the past, and may do so in the future, and that
Using the trackpad on OS X yields very similar effects to using a mouse wheel...
