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Adding a new value to an existing ENUM Type
...will receive the following error: default for column "my_column" cannot be cast automatically to type "my_enum". You will have to do the following: ALTER TABLE "my_table" ALTER COLUMN "my_column" DROP DEFAULT, ALTER COLUMN "my_column" TYPE "my_type" USING ("my_column"::text::"my_type"), ALTER...
Android Fragment lifecycle over orientation changes
...to them - this way you will know the class of each fragment and be able to cast correctly
– k29
Oct 14 '17 at 23:24
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Multiple Inheritance in C#
... Is it possible to have multiple inheritance and while having upcasts and downcasts be identity-preserving? The solutions I know of for the problems of multiple inheritance revolve around having casts that are not identity-preserving (if myFoo is of type Foo, which inherits from Moo and ...
Python - List of unique dictionaries
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@JorgeVidinha assuming each could be cast to str (or unicode), try this: {str(v['flight'])+':'+str(v['lon'])+','+str(v['lat']): v for v in stream}.values() This just creates a unique key based on your values. Like 'MH370:-21.474370,86.325589'
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How do I read an entire file into a std::string in C++?
... @DevSolar Well, the more legible version is ~30% shorter, lacks a cast and is otherwise equivalent. My question therefore stands: "What's the point of making it a oneliner?"
– sehe
Sep 21 '12 at 15:00
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What's the hardest or most misunderstood aspect of LINQ? [closed]
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Agreed. I'm a veteran and I just realized this implicit casting was taking place as I started writing my own QueryProvider
– TheSoftwareJedi
May 31 '09 at 16:31
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What is the reason behind cbegin/cend?
...that SomeFunctor cannot modify the elements of the vector (without a const-cast, of course). We explicitly get const_iterators, and therefore SomeFunctor::operator() will be called with const int &. If it takes it's parameters as int &, C++ will issue a compiler error.
C++17 has a more el...
Avoiding an ambiguous match exception
... of parameters and same types of parameters. I'm thinking here of explicit cast operators overloads. For example public static explicit double(MyType obj) and public static explicit float(MyType obj). You will still have an AmbiguousMatchException. In this case, you could use returnType.GetMethods()...
What is stack unwinding?
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Stack unwinding is usually talked about in connection with exception handling. Here's an example:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error(...
Change Canvas.Left property in code behind?
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Thanks, to get this to work I had to cast the integer: theObject.SetValue(Canvas.LeftProperty, (double)50);
– Edward Tanguay
Feb 12 '09 at 15:12
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