大约有 46,000 项符合查询结果（耗时：0.0524秒） [XML]
Get a random item from a JavaScript array [duplicate]
How do I get random item from items ?
13 Answers
13
...
Why is nginx responding to any domain name?
I have nginx up and running with a Ruby/Sinatra app and all is well. However, I'm now trying to have a second application running from the same server and I noticed something weird. First, here's my nginx.conf:
...
Application not picking up .css file (flask/python)
I am rendering a template, that I am attempting to style with an external style sheet. File structure is as follows.
10 Ans...
jQuery Ajax File Upload
...
File upload is not possible through AJAX.
You can upload file, without refreshing page by using IFrame.
You can check further details here.
UPDATE
With XHR2, File upload through AJAX is supported. E.g. through FormData object, but unfortunately it is not supported by all/old browsers....
Android - Camera preview is sideways
...
This issue appeared to start out as a bug with certain hardware see here but can be overcome by using the call to mCamera.setDisplayOrientation(degrees) available in API 8. So this is how I implement it:
public void surfaceChanged(SurfaceHolder holder, int format, in...
How to check if a file exists in Go?
...or not (like Python's os.path.exists ). What is the idiomatic way to do it?
11 Answers
...
Is the C# static constructor thread safe?
...cts/static-constructors
The implementation shown is thread safe for the initial construction, that is, no locking or null testing is required for constructing the Singleton object. However, this does not mean that any use of the instance will be synchronised. There are a variety of ways that this c...
PHP: If internet explorer 6, 7, 8 , or 9
I want to do a conditional in PHP for the different versions of Internet Explorer along the lines of:
17 Answers
...
What is the difference between '/' and '//' when used for division?
...he 2.x line, there is no difference for integers unless you perform a from __future__ import division, which causes Python 2.x to adopt the 3.x behavior.
Regardless of the future import, 5.0 // 2 will return 2.0 since that's the floor division result of the operation.
You can find a detailed descr...
Get a random boolean in python?
...
Adam's answer is quite fast, but I found that random.getrandbits(1) to be quite a lot faster. If you really want a boolean instead of a long then
bool(random.getrandbits(1))
is still about twice as fast as random.choice([True, False])
Both ...