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When to use -retainCount?
I would like to know in what situation did you use -retainCount so far, and eventually the problems that can happen using it.
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File being used by another process after using File.Create()
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The File.Create method creates the file and opens a FileStream on the file. So your file is already open. You don't really need the file.Create method at all:
string filePath = @"c:\somefilename.txt";
using (StreamWriter sw = new StreamWriter(filePath, true))
{
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How to change the href for a hyperlink using jQuery
...elector though. For instance, if you have a mix of link source (hyperlink) and link target (a.k.a. "anchor") anchor tags:
<a name="MyLinks"></a>
<a href="http://www.codeproject.com/">The CodeProject</a>
...Then you probably don't want to accidentally add href attributes to...
Camera 扩展：相机拍照和录像，程序控制拍照、自动拍照实现，而无需点击系...
.../community.appinventor.mit.edu/t/camera-displays-the-camera-to-take-photos-and-record-videos-in-an-arrangement/154998
发布日期：2025年9月4日
文档最后更新：2025年11月17日
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Add swipe to delete UITableViewCell
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if (editingStyle == UITableViewCellEditingStyle.Delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
Swift 3.0:
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
overrid...
How to assert two list contain the same elements in Python? [duplicate]
...h does exactly what you are looking for, as you can read from the python standard library documentation. The method is somewhat misleadingly named but it does exactly what you are looking for.
a and b have the same elements in the same number, regardless of their order
Here a simple example wh...
Python: Best way to add to sys.path relative to the current running script
... (let's say project/bin ). I also have a library located in project/lib and want the scripts to automatically load it. This is what I normally use at the top of each script:
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Getting the minimum of two values in SQL
I have two variables, one is called PaidThisMonth , and the other is called OwedPast . They are both results of some subqueries in SQL. How can I select the smaller of the two and return it as a value titled PaidForPast ?
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How would Git handle a SHA-1 collision on a blob?
This probably never happened in the real-world yet, and may never happen, but let's consider this: say you have a git repository, make a commit, and get very very unlucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle ...
How do you convert an entire directory with ffmpeg?
How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?
24 Answers
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