大约有 40,000 项符合查询结果（耗时：0.0890秒） [XML]
Cancellation token in Task constructor: why?
Certain System.Threading.Tasks.Task constructors take a CancellationToken as a parameter:
4 Answers
...
Why can't I call read() twice on an open file?
...d cursor at the end of the file (with nothing more to read). If you are looking to read a certain number of lines at a time you could use readline(), readlines() or iterate through lines with for line in handle:.
To answer your question directly, once a file has been read, with read() you can use ...
Using Linq to get the last N elements of a collection?
...ast N elements of that collection? If there isn't a method in the framework, what would be the best way to write an extension method to do this?
...
What is the difference between Caching and Memoization?
I would like to know what the actual difference between caching and memoization is.
As I see it, both involve avoiding repeated function calls to get data by storing it .
...
Using AES encryption in C#
...
If you just want to use the built-in crypto provider RijndaelManaged, check out the following help article (it also has a simple code sample):
http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx
And just in case you need the sample in a hurry, here it is ...
Read and write a String from text file
... dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
let fileURL = dir.appendingPathComponent(file)
//writing
do {
try text.write(to: fileURL, atomically: false, encoding: .utf8)
}
catch {/* error handling here */}
//reading
do ...
git pull keeping local changes
How can I safely update (pull) a git project, keeping specific files untouched, even if there's upstream changes?
6 Answers...
Maven: missing net.sf.json-lib
...
Looking at the maven-central repo, you need to specify a classifier for this dependency.
Either jdk13 or jdk15, like this:
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</...
How to test chrome extensions?
...ent script and saves data using localstorage. Are there any tools, frameworks, etc. that I can use to test this behavior? I realize there are some generic tools for testing javascript, but are those sufficiently power to test an extension? Unit testing is most important, but I'm also interested in o...
Bash variable scope
Please explain to me why the very last echo statement is blank? I expect that XCODE is incremented in the while loop to a value of 1:
...