大约有 16,000 项符合查询结果(耗时:0.0233秒) [XML]

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How do I get an animated gif to work in WPF?

... ((GifImage)sender).StopAnimation(); } } public static readonly DependencyProperty FrameIndexProperty = DependencyProperty.Register("FrameIndex", typeof(int), typeof(GifImage), new UIPropertyMetadata(0, new PropertyChangedCallback(ChangingFrameIndex))); static void C...
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Do browsers send “\r\n” or “\n” or does it depend on the browser?

...out what to do with the contents of a TEXTAREA. (See, for instance, this thread from an HTML working group about the issue.) Here's a quote from the HTTP/1.1 spec about message headers: The line terminator for message-header fields is the sequence CRLF. However, we recommend that applications, ...
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What is process.env.PORT in Node.js?

...ent so port will get the value of it. Remember that this operation will be read from left to right and stop at the first available value if any. – HoCo_ May 13 '18 at 22:09 ad...
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What is an idempotent operation?

... then uses the HTTP verbs of POST, PUT, GET, and DELETE to create, update, read, and delete those resources. Idempotence plays an important role in REST. If you GET a representation of a REST resource (eg, GET a jpeg image from Flickr), and the operation fails, you can just repeat the GET again an...
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R programming: How do I get Euler's number?

...ited this page without complaint until now suggests to me that many people read "Euler's constant" to mean e, and if you change the title, future searchers will fail to find this page. Also, glancing at wikipedia, it seems this reading of "Euler's constant" is quite widespread (since there's even a ...
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What is the best scripting language to embed in a C# desktop application? [closed]

... /// The main entry point for the application. /// [STAThread] static void Main() { // Lets compile some code (I'm lazy, so I'll just hardcode it all, i'm sure you can work out how to read from a file/text box instead Assembly compiledScript...
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What is the fastest way to send 100,000 HTTP requests in Python?

...thon 2.6, and so far looked at the many confusing ways Python implements threading/concurrency. I have even looked at the python concurrence library, but cannot figure out how to write this program correctly. Has anyone come across a similar problem? I guess generally I need to know how to perf...
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What is an optional value in Swift?

...ional<String>. Everything Swift does with optionals is magic to make reading and writing code more fluent. Unfortunately this obscures the way it actually works. I'll go through some of the tricks later. Note: I'll be talking about optional variables a lot, but it's fine to create optional con...
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Using NSPredicate to filter an NSArray based on NSDictionary keys

...= %@)", @"foo"]];' where 'data' is the nsarray of nsdictionaries that is already in your code. (thank you suraken) – tmr Jan 28 '15 at 18:20 ...
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Haskell, Lisp, and verbosity [closed]

... @JohannesGerer: I have not tried it, but as far as I have read, GHCi is not a shell into the running image, where you can redefine and extend arbitrary parts of the entire program while it is running. Also, Haskell syntax makes it much harder to copy program fragments between the r...