大约有 30,000 项符合查询结果（耗时：0.0464秒） [XML]
Is it true that one should not use NSLog() on production code?
I was told this a few times in this very site, but I wanted to make sure this is really the case.
12 Answers
...
Wrap long lines in Python [duplicate]
...{1}').format(3, 5))
Adjacent string literals are concatenated at compile time, just as in C. http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation is a good place to start for more info.
share...
How to check internet access on Android? InetAddress never times out
...eck the network access to a host name. But the doInBackground() is never timed out. Anyone have a clue?
58 Answers
...
Quickly reading very large tables as dataframes
... down. In my case, I am assuming I know the types of the columns ahead of time, the table does not contain any column headers or row names, and does not have any pathological characters that I have to worry about.
...
android EditText - finished typing event
...
I tried this but it did not work. Every time I pressed enter it would give me a message similar to this: W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=605.52246, y[0]=969.4336, toolType[0]...
What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First?
...collection of entities is automatically loaded from the database the first time it is accessed.
For example, when using the Blog entity class defined below, the related Posts will be loaded the first time the Posts navigation property is accessed:
public class Blog
{
public int BlogId { ge...
Remove a fixed prefix/suffix from a string in Bash
...r used as delimiter which will break the whole command. 3) Calling sed two times is not necessary (you can -e 's///' -e '///' instead) and the pipe could also be avoided. For example, consider string='./ *' and/or prefix='./' and see it break horribly due to 1) and 2).
– Adrian...
Extract first item of each sublist
...ue and got curious about the performance of each solution.
Here's is the %timeit:
import numpy as np
lst = [['a','b','c'], [1,2,3], ['x','y','z']]
The first numpy-way, transforming the array:
%timeit list(np.array(lst).T[0])
4.9 µs ± 163 ns per loop (mean ± std. dev. of 7 runs, 100000 loops ...
Convert Python program to C/C++ code? [closed]
...lain numerical code that doesn't interface with Python at all for the most time!). But other than that, yes, it can get you a pretty devent speedup.
– user395760
Jan 10 '11 at 19:00
...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
...
You saved my lots of time. Upgrading Android Studio caused nightmare of troubles. This was one of them. I wonder if SO wasn't around more than half of the Android Development would have died. Android Studio gives no clues about errors.
...