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Use 'class' or 'typename' for template parameters? [duplicate]

...particularly clear, to be honest. in T::A *obj; the language, as far as I know, should parse the statement as a declaration because of the declaration rule: anything that looks like a declaration, even if it ambiguously looks like something else, should resolve into a declaration[0]. I also didn't f...
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Cast Int to enum in Java

...lain why you regard MyEnum.values()[x] as an expensive operation. I don't know how it works in details, but to me it seems like accessing an element in an Array would be no big deal, aka constant time. If the array has to be build it takes O(n) time, which is the same runnning time as your solution....
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If my interface must return Task what is the best way to have a no-operation implementation?

... Sorry, I had to mention the context :) As I see it now, we can make public Task WillBeLongRunningAsyncInTheMajorityOfImplementations() as well as public async Task WillBeLongRunningAsyncInTheMajorityOfImplementations(). So, we can either return CompletedTask; or await Complet...
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Where is the itoa function in Linux?

...intf(target_string, size_of_target_string_in_bytes, "%d", source_int). I know it's not quite as concise or cool as itoa(), but at least you can Write Once, Run Everywhere (tm) ;-) Here's the old (edited) answer You are correct in stating that the default gcc libc does not include itoa(), like sev...
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Passing Objects By Reference or Value in C#

...value, as the initial value of the parameter of the method you're calling. Now the important point is that the value is a reference for reference types - a way of getting to an object (or null). Changes to that object will be visible from the caller. However, changing the value of the parameter to r...
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Detecting WPF Validation Errors

...The posted code did not work for me when using a ListBox. I rewrote it and now it works: public static bool IsValid(DependencyObject parent) { if (Validation.GetHasError(parent)) return false; // Validate all the bindings on the children for (int i = 0; i != VisualTreeHelper.Ge...
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what exactly is device pixel ratio?

this is mentioned every article about mobile web, but nowhere I can found an explanation of what exactly does this attribute measure. Can anyone please elaborate what does queries like this check? ...
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Print in one line dynamically

...sh() forces a file to send whatever it's got to the operating system right now. I'm surprised it works for you without that -- it didn't work for me until I added it. – zwol Jul 15 '10 at 18:38 ...
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Change auto increment starting number?

... Anyone know if it is possible to do WITHOUT an ALTER? – thesmart Jul 23 '12 at 22:15 3 ...
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How to spread django unit tests over multiple files?

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