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Why doesn't Java support unsigned ints?
...tially can be treated as an unsigned integer. You would have to explicitly cast arithmetic operations back into char, but it does provide you with a way to specify unsigned numbers.
char a = 0;
char b = 6;
a += 1;
a = (char) (a * b);
a = (char) (a + b);
a = (char) (a - 16);
b = (char) (b % 3);
b = ...
Efficiently convert rows to columns in sql server
... + 'SELECT ''INSERT INTO @ColumnListWithActions VALUES ('' + CAST( ROW_NUMBER() OVER (ORDER BY [NAME]) as nvarchar(10)) + '', '' + '''''''' + [NAME] + ''''''''+ '', ''''S'''');'''
+ 'FROM [' + @DB_Name + '].sys.columns '
...
SQL: IF clause within WHERE clause
...his without any IF or CASE
WHERE
(IsNumeric(@OrderNumber) AND
(CAST OrderNumber AS VARCHAR) = (CAST @OrderNumber AS VARCHAR)
OR
(NOT IsNumeric(@OrderNumber) AND
OrderNumber LIKE ('%' + @OrderNumber))
Depending on the flavour of SQL you may need to tweak the casts on the orde...
Running multiple commands with xargs
In the example above, xargs takes echo % as the command argument. But in some cases, I need multiple commands to process the argument instead of one. For example:
...
Spring ApplicationContext - Resource leak: 'context' is never closed
...
A simple cast solves the issue:
((ClassPathXmlApplicationContext) fac).close();
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How to Unit test with different settings in Django?
.../#overriding-settings
TestCase will have a self.settings context manager, and there will also be an @override_settings decorator that can be applied to either a test method or a whole TestCase subclass.
These features did not exist yet in Django 1.3.
If you want to change settings for all your te...
How get integer value from a enum in Rails?
... :(
The best method I can see for now is:
my_model.sale_info_before_type_cast
Shadwell's answer also continues to work for rails 5.
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How to concatenate columns in a Postgres SELECT?
...n any case.
For non-string data types, you can "fix" the 1st statement by casting at least one argument to text. (Any type can be cast to text):
SELECT a::text || b AS ab FROM foo;
Judging from your own answer, "does not work" was supposed to mean "returns NULL". The result of anything concatena...
How to get hosting Activity from a view?
...
This is a pretty dangerous cast to make. There is a good chance (if you're using appcompat) that the context you've got is wrapped, casting something like a ContextThemeWrapper to Activity will throw a ClassCastException. You'd need a way to unwrap the...
Covariance and contravariance real world example
...);
Covariant(fruit);
Covariant(apple); //apple is being upcasted to fruit, without the out keyword this will not compile
}
public void Contravariance()
{
IContravariant<Fruit> fruit = new Contravariant<Fruit>();
IContravariant<Apple> ap...