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How to pull a random record using Django's ORM?

...the count changes in between, it might be possible to get an out of bounds error. – Nelo Mitranim Sep 12 '15 at 9:37 2 ...
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What is the use of having destructor as private?

... // } int main () { myclass m; // error: ctor and dtor are private myclass* mp = new myclass (..); // error: private ctor myclass* mp = myclass::create(..); // OK delete mp; // error: private dtor myclass::destroy...
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Can constructors throw exceptions in Java?

... @Ghilteras: Whereas I'd definitely rather express errors through the language-idiomatic way of expressing them: which is through exceptions in Java. To my mind, avoiding that idiom is where code gymnastics come in. Likewise mocking is far more effective when you've already u...
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?

...(1.7.0) does not compile "Object[] arr = new int[1];" but rather gives the error message: "java: incompatible types required: java.lang.Object[] found: int[]". I think you meant "Object[] arr = new Integer[1];". – Emre Sevinç Jan 2 '13 at 13:46 ...
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Rename a class in Xcode: Refactor… is grayed out (disabled). Why?

...ame" in latest xcode and it failed - again! (this time with the incorrect error: "Unable to determine the language of", one of those error messages where Apple put the wrong text in place) share | ...
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Fastest way to find second (third…) highest/lowest value in vector or column

... I used this method, but get the following error: Error in sort.int(x, na.last = na.last, decreasing = decreasing, ...) : index 4705 outside bounds Any idea what might the issue be? Some details: My x is a numeric vector of length 4706 with some NAs in the data. I...
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How can you find out which process is listening on a port on Windows?

... to run your command line shell as administrator, otherwise you may get an error message about insufficient privileges. Use the "Run as administrator" option when right-clicking cmd.exe. – Gruber Jul 29 '14 at 11:20 ...
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How can I fix WebStorm warning “Unresolved function or method” for “require” (Firefox Add-on SDK)

... I still have the error in the compiler error TS2304: Cannot find name 'require'. – SuperUberDuper Oct 21 '16 at 12:12 ...
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“PKIX path building failed” and “unable to find valid certification path to requested target”

...ts using twitter4j library for my java project. On my first run I got an error about certificate sun.security.validator.ValidatorException and sun.security.provider.certpath.SunCertPathBuilderException . Then I added twitter certificate by: ...
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How do I redirect to the previous action in ASP.NET MVC?

...rer is NULL when I was in the some page and want to get to view I know got error just by entering URL in address bar. Why when I enter URL in Address Bar it can't determine UrlReferrer? – QMaster Jan 7 '15 at 12:27 ...