大约有 11,000 项符合查询结果（耗时：0.0223秒） [XML]
Best way to test if a row exists in a MySQL table
I'm trying to find out if a row exists in a table. Using MySQL, is it better to do a query like this:
12 Answers
...
Use Font Awesome Icon in Placeholder
Is it possible to use Font Awesome Icon in a Placeholder? I read that HTML isn't allowed in a placeholder. Is there a workaround?
...
How do I create a Python function with optional arguments?
I have a Python function which takes several arguments. Some of these arguments could be omitted in some scenarios.
2 Answe...
How can I unit test a GUI?
The calculations in my code are well-tested, but because there is so much GUI code, my overall code coverage is lower than I'd like. Are there any guidelines on unit-testing GUI code? Does it even make sense?
...
Python Write bytes to file
I have a function that returns a string. The string contains carriage returns and new line feeds (0x0D, 0x0A). However when I write to a file it contains only the new line feeds. Is there a way to get the output to include the carriage return and the new line feed.
...
PG::ConnectionBad - could not connect to server: Connection refused
...
32 Answers
32
Active
...
json_encode is returning NULL?
For some reason the item "description" returns NULL with the following code:
10 Answers
...
How to force a html5 form validation without submitting it via jQuery
I have this form in my app and I will submit it via AJAX, but I want to use HTML5 for client-side validation. So I want to be able to force the form validation, perhaps via jQuery.
...
Programmatically generate video or animated GIF in Python?
I have a series of images that I want to create a video from. Ideally I could specify a frame duration for each frame but a fixed frame rate would be fine too. I'm doing this in wxPython, so I can render to a wxDC or I can save the images to files, like PNG. Is there a Python library that will al...
Get first n characters of a string
How can I get the first n characters of a string in PHP? What's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
...