大约有 45,000 项符合查询结果（耗时：0.0681秒） [XML]
Checking for empty queryset in Django
...fer to has for contract to raise 404 if the filtering expression does not hit any records or to produce a list of the result if there are records. The code there will hit the database just once. If they used exist() or count() to first check whether there are going to be records returned, they'd be ...
Breaking/exit nested for in vb.net
...
Unfortunately, there's no exit two levels of for statement, but there are a few workarounds to do what you want:
Goto. In general, using goto is considered to be bad practice (and rightfully so), but using goto solely for a forward jump out of structu...
Play an audio file using jQuery when a button is clicked
I am trying to play an audio file when I click the button, but it's not working, my html code is:
6 Answers
...
What is the most compatible way to install python modules on a Mac?
I'm starting to learn python and loving it. I work on a Mac mainly as well as Linux. I'm finding that on Linux (Ubuntu 9.04 mostly) when I install a python module using apt-get it works fine. I can import it with no trouble.
...
Strange out of memory issue while loading an image to a Bitmap object
I have a list view with a couple of image buttons on each row. When you click the list row, it launches a new activity. I have had to build my own tabs because of an issue with the camera layout. The activity that gets launched for the result is a map. If I click on my button to launch the image pre...
Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
...follow
|
edited Jul 14 at 16:31
Jerry Chong
1,5781818 silver badges2222 bronze badges
ans...
What's the difference between @Component, @Repository & @Service annotations in Spring?
Can @Component , @Repository and @Service annotations be used interchangeably in Spring or do they provide any particular functionality besides acting as a notation device?
...
How to get root access on Android emulator?
...ssarily complicated :)
$ > adb shell
generic_x86:/ $
generic_x86:/ $ exit
$ > adb root
restarting adbd as root
$ > adb shell
generic_x86:/ #
share
|
improve this answer
|
...
UIScrollView not scrolling
...
It's always good to show a complete working code snippet:
// in viewDidLoad (if using Autolayout check note below):
UIScrollView *myScrollView;
UIView *contentView;
// scrollview won't scroll unless content size explicitly ...
Change IPython/Jupyter notebook working directory
When I open a Jupyter notebook (formerly IPython) it defaults to C:\Users\USERNAME .
31 Answers
...