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Why can I throw null in Java? [duplicate]
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why does it upcast it to a NullPointerException?
As per JLS 14.18:
A throw statement first evaluates the Expression. If the evaluation of the Expression completes abruptly for some reason, then the throw completes abruptly for that re...
Fast ceiling of an integer division in C / C++
...promote the arguments into long long's? And doesn't that cost anything, up-casting or down-casting?
– einpoklum
Feb 13 '16 at 20:51
1
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Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
...valuates to (or converts to in some cases) a 1.
declare @i int = -42
print cast(@i as bit) --will print 1, because @i is not 0
Note that SQL Server uses three valued logic (true, false, and NULL), since NULL is a possible value of the bit data type. Here are the relevant truth tables -
More in...
How to use GROUP_CONCAT in a CONCAT in MySQL
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SELECT id, GROUP_CONCAT(CONCAT_WS(':', Name, CAST(Value AS CHAR(7))) SEPARATOR ',') AS result
FROM test GROUP BY id
you must use cast or convert, otherwise will be return BLOB
result is
id Column
1 A:4,A:5,B:8
2 C:9
you have to hand...
Making a mocked method return an argument that was passed to it
... the returns Iterator<? extends ClassName> which causes all kinds of cast problems in a thenReturn() statement.
– Michael Shopsin
Mar 20 '15 at 15:56
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Purpose of Activator.CreateInstance with example?
...cyObject)Activator.CreateInstance("MyAssembly", ClassName)) but instead of casting with the type. Cast with type made from the ClassName? Like this Type type = Type.GetType(ClassName);obj = (type )Activator.CreateInstance("MyAssembly", ClassName)) ?
– rluks
Mar...
How is an overloaded method chosen when a parameter is the literal null value?
...ween them? Then you must be explicit regarding which one you want (i.e. by casting your null reference question.method((String)null))
– Edwin Dalorzo
Oct 23 '12 at 15:01
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Use 'class' or 'typename' for template parameters? [duplicate]
...is no such rule. The rule is only about expressions that have a functional cast as the first subexpression. In your example, if T::A is a type, the construct T::A *obj is actually ambiguous in the current Standard (as it turned out when I discussed it with the core group some weeks ago). However sin...
Is it possible to solve the “A generic array of T is created for a varargs parameter” compiler warni
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Explicitly casting parameters to Object in vararg method invocation will make the compiler happy without resorting to @SuppressWarnings.
public static <T> List<T> list( final T... items )
{
return Arrays.asList( items )...
SQL variable to hold list of integers
...n need put coma on begin and end
select *
from TabA
where charindex(',' + CAST(TabA.ID as nvarchar(20)) + ',', @listOfIDs) > 0
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