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How does collections.defaultdict work?

... How do we know what is the default value for each type? 0 for int() and [] for list() are intuitive, but there can also be more complex or self-defined types. – Sean Mar 11 at 10:40 ...
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Subclassing a Java Builder class

...Builder<?> builder) { calories = builder.calories; } } Now instantiate the base builder with the derived class builder as the generic argument. public class GMOFacts extends NutritionFacts { private final boolean hasGMO; public static class Builder extends NutritionFac...
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Error: Can't set headers after they are sent to the client

... You know I have this exact problem due to what you call a problematic middleware, however I need a case where I return response but would like to do further processing in a separate controller as part of the chain, how do I go abo...
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In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?

...ke AJAX does -- but long polling was created when WebSockets didn't exist. Now due to WebSockets, long polling is going away. WebRTC allows for peer-to-peer communication. I recommend learning WebSockets. Comparison: of different communication techniques on the web AJAX - request → respons...
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What are the benefits of using C# vs F# or F# vs C#? [closed]

...uld probably be some people who disagree with this since it's "cool" right now to "prove" how easy it is to do anything in F#, but I stand by it). There are countless others. share ...
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What is the relation between BLAS, LAPACK and ATLAS

... Thanks for the explanations. Do you know any examples of HOW to use ATLAS+LAPACK? I need to see a few examples to understand how to use these! I understand what they are for and the theory of what they do, but I can hardly find any examples in C on how to implem...
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How to draw rounded rectangle in Android UI?

... They didn't ask for a gradient. Don't know why this is accepted answer. – Jerry Destremps Aug 6 '19 at 21:18 ...
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Run java jar file on a server as background process

... Short answer: it depends on the server. Long answer: as far as I know, there is no safe way to shut down a process without the process supporting such graceful shut downs. For example, if it's a web server being terminated by an external signal, there is always a possibility that some reque...
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Difference Between ViewData and TempData?

I know what ViewData is and use it all the time, but in ASP.NET Preview 5 they introduced something new called TempData. 6...
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Reject binary with state waiting for review (can't find reject binary button)

...ary" (validation failed) or "Waiting for Review" (validation succeeded and now just wait). That's what the iTunes Connect FAQ/Manual says. ;-) – Constantino Tsarouhas May 2 '12 at 22:44 ...