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Enum “Inheritance”
... int values to the constants as defined in the existing enum, then you can cast between the enum and the constants, e.g:
public enum SomeEnum // this is the existing enum (from WSDL)
{
A = 1,
B = 2,
...
}
public class Base
{
public const int A = (int)SomeEnum.A;
//...
}
public c...
printf format specifiers for uint32_t and size_t
...eded is that the format specifiers and the types agree, and you can always cast to make that true. long is at least 32bits, so %lu together with (unsigned long)k is always correct. size_t is trickier, which is why %zu was added in C99. If you can't use that, then treat it just like k (long is the bi...
What is a raw type and why shouldn't we use it?
... String name = (String) o;
System.out.println(name);
} // throws ClassCastException!
// java.lang.Boolean cannot be cast to java.lang.String
Now we run into trouble at run-time, because names contains something that isn't an instanceof String.
Presumably, if you want names to contain only...
Can someone explain this 'double negative' trick? [duplicate]
... find it highly intuitive to know what's "falsey" and what's "truthy" when cast to a Boolean.
– Chris
Jul 30 '13 at 3:15
...
SQL “between” not inclusive
...t when the day starts.
One way to fix this is:
SELECT *
FROM Cases
WHERE cast(created_at as date) BETWEEN '2013-05-01' AND '2013-05-01'
Another way to fix it is with explicit binary comparisons
SELECT *
FROM Cases
WHERE created_at >= '2013-05-01' AND created_at < '2013-05-02'
Aaron Bert...
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 = ...
Why does Convert.ToString(null) return a different value if you cast null?
...2f10355736%2fwhy-does-convert-tostringnull-return-a-different-value-if-you-cast-null%23new-answer', 'question_page');
}
);
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Name
...
Can I assume (bool)true == (int)1 for any C++ compiler?
...
Yes. The casts are redundant. In your expression:
true == 1
Integral promotion applies and the bool value will be promoted to an int and this promotion must yield 1.
Reference: 4.7 [conv.integral] / 4: If the source type is bool....
MySQL “between” clause not inclusive?
...ly has a time component.
To truncate it out:
select * from person
where CAST(dob AS DATE) between '2011-01-01' and '2011-01-31'
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Difference between new and override
...y.
When you hide a method, you can still access the original method by up casting to the base class. This is useful in some scenarios, but dangerous.
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