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When should you use 'friend' in C++?

...t;typename Derived> struct Policy { void doSomething() { // casting this to Derived* requires us to see that we are a // base-class of Derived. some_type const& t = static_cast<Derived*>(this)->getSomething(); } }; // note, derived privately template...
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What is the difference between == and Equals() for primitives in C#?

...t, so you aren't calling it. You could force it to call this method with a cast: Console.WriteLine(newAge.Equals((short)age)); // true This will call short.Equals(short) directly, without boxing. If age is larger than 32767, it will throw an overflow exception. You could also call the short.Equals(...
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PHP: Count a stdClass object

...(unless it's a custom object that implements the Countable interface). Try casting the object, like below, as an array and seeing if that helps. $total = count((array)$obj); Simply casting an object as an array won't always work but being a simple stdClass object it should get the job done here. ...
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C++ catch blocks - catch exception by value or reference? [duplicate]

...onst object and catch it with a non-const reference. To avoid this silent "casting away" of const, always catch a const reference, and ensure your exception types have const-correct accessors. – Daniel Earwicker Mar 26 '10 at 10:01 ...
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How do you convert a DataTable into a generic list?

... System.Data.DataSetExtensions.dll, List<DataRow> rows = table.Rows.Cast<DataRow>().ToList(); share | improve this answer | follow | ...
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Get current date in milliseconds

... Casting the NSTimeInterval directly to a long overflowed for me, so instead I had to cast to a long long. long long milliseconds = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0); The result is a 13 digit times...
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PHP - Get bool to echo false when false

...'s a weird way to do it, because array keys cannot be bool types. PHP will cast that to array(0 => 'false', 1 => 'true'). – Mark E. Haase Feb 9 '11 at 19:00 66 ...
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How to set DialogFragment's width and height?

... @jmaculate - Quick question: when you are casting to (android.view.WindowManager.LayoutParams), what are you casting it from? I was puzzled when choosing the correct import for LayoutParams appearing in the first 3 lines of the function. Ended up choosing (android.vi...
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Cannot set boolean values in LocalStorage?

...otally didn't realize that. I thought if one were a string, the other was cast to a string. Cheers (+1). – Andy E Jul 16 '10 at 9:01 2 ...
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How do I convert NSMutableArray to NSArray?

... However, casting to (NSArray *) still allows a cast back up to (NSMutable *). Ain't that the case? – sharvey Nov 20 '10 at 2:22 ...