大约有 45,000 项符合查询结果（耗时：0.0428秒） [XML]
How to make MySQL handle UTF-8 properly
...sure my database can handle UTF-8 characters correctly. How I can do this with MySQL?
14 Answers
...
SQL Add foreign key to existing column
...I am using the following SQL command in SQL Server 2008 to update a table with a foreign key constraint:
6 Answers
...
Best way to select random rows PostgreSQL
...
Given your specifications (plus additional info in the comments),
You have a numeric ID column (integer numbers) with only few (or moderately few) gaps.
Obviously no or few write operations.
Your ID column has to be indexed! A primary key serves nicely.
Th...
Is there a “goto” statement in bash?
Is there a "goto" statement in bash ? I know It is considered bad practice, but I need specifically "goto".
12 Answers
...
How to create a video from images with FFmpeg?
...v libx264 -vf "fps=25,format=yuv420p" out.mp4
I tested below parameters, it worked for me
"e:\ffmpeg\ffmpeg.exe" -r 1/5 -start_number 0 -i "E:\images\01\padlock%3d.png" -c:v libx264 -vf "fps=25,format=yuv420p" e:\out.mp4
below parameters also worked but it always skips the first image
"e:\ffmp...
PHP abstract properties
...are properties because they are containers of data reserved in memory on initialization.
A function on the other hand can be declared (types, name, parameters) without being defined (function body missing) and thus, can be made abstract.
"Abstract" only indicates that something was declared but n...
How to print SQL statement in codeigniter model
...m of your pages.
To enable the profiler place the following line anywhere within your Controller methods:
$this->output->enable_profiler(TRUE);
Profiling user guide:
https://www.codeigniter.com/user_guide/general/profiling.html
...
Extract value of attribute node via XPath
...follow
|
edited Jan 2 '13 at 22:15
Rory O'Kane
23.8k1111 gold badges8080 silver badges119119 bronze badges
...
Get raw POST body in Python Flask regardless of Content-Type header
...ll be empty if form data is parsed. How can I get the raw post body unconditionally?
4 Answers
...
How to calculate moving average using NumPy?
...nt a straightforward non-weighted moving average, you can easily implement it with np.cumsum, which may be is faster than FFT based methods:
EDIT Corrected an off-by-one wrong indexing spotted by Bean in the code. EDIT
def moving_average(a, n=3) :
ret = np.cumsum(a, dtype=float)
ret[n:] = ...