大约有 3,285 项符合查询结果（耗时：0.0221秒） [XML]
Finding the average of a list
...
Oh, but np.array(l).mean() is much faster.
– L. Amber O'Hearn
Sep 23 '15 at 19:16
8
...
Is the primary key automatically indexed in MySQL?
...that you use in your most vital queries. It has an associated index,
for fast query performance
For MySQL 5.0 reference see: http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html
Most MySQL indexes (PRIMARY KEY, UNIQUE, INDEX, and FULLTEXT) are
stored in B-trees. Exceptions are that in...
How to remove duplicate white spaces in string using Java?
...
hi the fastest (but not prettiest way) i found is
while (cleantext.indexOf(" ") != -1)
cleantext = StringUtils.replace(cleantext, " ", " ");
this is running pretty fast on android in opposite to an regex
...
Check if character is number?
...ks with multi-digit numbers). My solution may not be as clear, but is much faster than this.
– user2486570
Jul 19 '14 at 16:36
add a comment
|
...
Find out time it took for a python script to complete execution
...lternatively, you can use timeit. I often use the time approach due to how fast I can bang it out, but if you're timing an isolate-able piece of code, timeit comes in handy.
From the timeit docs,
def test():
"Stupid test function"
L = []
for i in range(100):
L.append(i)
if __n...
File changed listener in Java
...tly and super simple to use. I've been using inotify for many years. It is fast, stable and reliable
– oᴉɹǝɥɔ
Jun 11 '13 at 18:31
add a comment
|
...
How to get a value from a cell of a dataframe?
...
These are fast access for scalars
In [15]: df = pandas.DataFrame(numpy.random.randn(5,3),columns=list('ABC'))
In [16]: df
Out[16]:
A B C
0 -0.074172 -0.090626 0.038272
1 -0.128545 0.762088 -0.714816
2 0....
Intelli J IDEA takes forever to update indices
...liJ will restart and then you can see that all the indexing is done really fast.
share
|
improve this answer
|
follow
|
...
Beginners Guide to Haskell? [closed]
...
This is a very good book, but IMHO it also has quite a fast pace in some of the later chapters that may be difficult for a Haskell beginner (like myself).
– stakx - no longer contributing
Aug 14 '11 at 17:15
...
Best way to check if UITableViewCell is completely visible
...ill not instantiate the cell if it is not visible, and thus will be rather fast.
Swift
let cellRect = tableView.rectForRowAtIndexPath(indexPath)
let completelyVisible = tableView.bounds.contains(cellRect)
Obj-C
CGRect cellRect = [tableView rectForRowAtIndexPath:indexPath];
BOOL completelyVisibl...