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Is it possible to print a variable's type in standard C++?
...ecltype((ci))>() << '\n';
std::cout << "decltype(static_cast<int&>(i)) is " << type_name<decltype(static_cast<int&>(i))>() << '\n';
std::cout << "decltype(static_cast<int&&>(i)) is " << type_name<decltype(stati...
What's the difference between std::move and std::forward
...a new value and continue using it.
std::forward has a single use case: to cast a templated function parameter (inside the function) to the value category (lvalue or rvalue) the caller used to pass it. This allows rvalue arguments to be passed on as rvalues, and lvalues to be passed on as lvalues, a...
Alternative to itoa() for converting integer to string C++? [duplicate]
...
boost::lexical_cast works pretty well.
#include <boost/lexical_cast.hpp>
int main(int argc, char** argv) {
std::string foo = boost::lexical_cast<std::string>(argc);
}
...
Convert character to ASCII numeric value in java
...
Very simple. Just cast your char as an int.
char character = 'a';
int ascii = (int) character;
In your case, you need to get the specific Character from the String first and then cast it.
char character = name.charAt(0); // This gives...
Why does (0 < 5 < 3) return true?
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My guess is because 0 < 5 is true, and true < 3 gets cast to 1 < 3 which is true.
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How to report an error from a SQL Server user-defined function
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You can use CAST to throw meaningful error:
create function dbo.throwError()
returns nvarchar(max)
as
begin
return cast('Error happened here.' as int);
end
Then Sql Server will show some help information:
Msg 245, Level 16, State...
How can i query for null values in entity framework?
...CASE
WHEN ([Extent1].[ProductStyleID] = NULL /* @p__linq__2 */) THEN cast(1 as bit)
WHEN ([Extent1].[ProductStyleID] <> NULL /* @p__linq__2 */) THEN cast(0 as bit)
END
WHEN (([Extent1].[ProductStyleID] IS NULL)
AND (2 /* @p__linq__3 */ IS NOT NULL)) THEN
CASE
...
LINQ query on a DataTable
...on works with myDataTable.Rows is because the myRow variable is explicitly cast to DataRow. When it is compiled, that query is rewritten to myDataTable.Rows.Cast<DataRow>().Where(myRow => (int)myRow["RowNo"] == 1). Personally, I don't find the call to AsEnumerable() any more complicated tha...
Setting Short Value Java
...or byte or short types. Instead, you may declare it as such using explicit casting:
byte foo = (byte)0;
short bar = (short)0;
In your setLongValue(100L) method call, you don't have to necessarily include the L suffix because in this case the int literal is automatically widened to a long. This is...
Can we make unsigned byte in Java
...7 to a byte (or lower than -128). However, there's nothing to stop you downcasting an int (or short) in order to achieve this:
int i = 200; // 0000 0000 0000 0000 0000 0000 1100 1000 (200)
byte b = (byte) 200; // 1100 1000 (-56 by Java specification, 200 by convention)
/*
* Will print a negative ...