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How to round an average to 2 decimal places in PostgreSQL?
... | numeric, integer | normal
(4 rows)
regress=> SELECT round( CAST(float8 '3.1415927' as numeric), 2);
round
-------
3.14
(1 row)
(In the above, note that float8 is just a shorthand alias for double precision. You can see that PostgreSQL is expanding it in the output).
You must c...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
...rying ". I'm trying to change it to " Integer " but it gives an error that casting is not possible.
8 Answers
...
Getting the max value of an enum
... Bang = 2
}
// this gets Fizz
var lastFoo = Enum.GetValues(typeof(Foo)).Cast<Foo>().Last();
Edit
For those not willing to read through the comments: You can also do it this way:
var lastFoo = Enum.GetValues(typeof(Foo)).Cast<Foo>().Max();
... which will work when some of your en...
Safely casting long to int in Java
What's the most idiomatic way in Java to verify that a cast from long to int does not lose any information?
10 Answers
...
How do I cast a variable in Scala?
Given a variable with type Graphics ,
how do I cast it to Graphics2D in Scala?
2 Answers
...
What is the difference between up-casting and down-casting with respect to class variable
What is the difference between up-casting and down-casting with respect to class variable?
10 Answers
...
Type safety: Unchecked cast
...ext().getBean("someMap");
Secondly, the compiler is complaining that you cast the object to a HashMap without checking if it is a HashMap. But, even if you were to do:
if(getApplicationContext().getBean("someMap") instanceof HashMap) {
private Map<String, String> someMap = (HashMap<S...
Concept of void pointer in C programming
Is it possible to dereference a void pointer without type-casting in the C programming language?
15 Answers
...
Specifically, what's dangerous about casting the result of malloc?
... the first one), you can get an unpredictable runtime error when using the cast without including stdlib.h.
So the error on your side is not the cast, but forgetting to include stdlib.h. Compilers may assume that malloc is a function returning int, therefore converting the void* pointer actually re...
explicit casting from super class to subclass
...does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
...