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How to iterate over values of an Enum having flags?
.... Just stick this as an extension method: Enum.GetValues(input.GetType()).Cast<Enum>().Where(input.HasFlag); Then just: myEnum.GetFLags() :)
– joshcomley
Aug 16 '13 at 12:28
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Lambda capture as const reference?
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In c++14 using static_cast / const_cast:
[&best_string = static_cast<const std::string&>(best_string)](const string& s)
{
best_string = s; // fails
};
DEMO
In c++17 using std::as_const:
[&best_string = std::as_cons...
How to get Time from DateTime format in SQL?
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SQL Server 2008:
SELECT cast(AttDate as time) [time]
FROM yourtable
Earlier versions:
SELECT convert(char(5), AttDate, 108) [time]
FROM yourtable
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Differences in auto-unboxing between Java 6 vs Java 7
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It looks like the language in section 5.5 Casting Conversion of Java 7 JLS was updated in comparison to the same section in the Java 5/6 JLS, probably to clarify the allowed conversions.
Java 7 JLS says
An expression of a reference type may undergo casting conve...
Why does casting int to invalid enum value NOT throw exception?
... }
/// <summary>
/// In the .NET Framework, objects can be cast to enum values which are not
/// defined for their type. This method provides a simple fail-fast check
/// that the enum value is defined, and creates a cast at the same time.
/// Cast the given value as the ...
How to change column datatype from character to numeric in PostgreSQL 8.4
...m the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cast from old to new type.
So this might work (depending on your data):
alter table presales alter column code type nume...
What are the main purposes of using std::forward and which problems it solves?
... modify these
The third attempt accepts const-references, but then const_cast's the const away:
template <typename A, typename B, typename C>
void f(const A& a, const B& b, const C& c)
{
E(const_cast<A&>(a), const_cast<B&>(b), const_cast<C&>(c))...
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...your array will never contain more than 2^31-1 elements!),
add an explicit cast:
int count = (int)[myColors count];
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java: (String[])List.toArray() gives ClassCastException
The following code (run in android) always gives me a ClassCastException in the 3rd line:
4 Answers
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How to set selected item of Spinner by value, not by position?
...getAdapter()).getPosition(myString));
You'll get a warning about how the cast to a ArrayAdapter<String> is unchecked... really, you could just use an ArrayAdapter as Merrill did, but that just exchanges one warning for another.
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