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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...
Convert List to List
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The way to make this work is to iterate over the list and cast the elements. This can be done using ConvertAll:
List<A> listOfA = new List<C>().ConvertAll(x => (A)x);
You could also use Linq:
List<A> listOfA = new List<C>().Cast<A>().ToList();
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How to cast an object in Objective-C
Is there a way to cast objects in objective-c much like the way objects are cast in VB.NET?
5 Answers
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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
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How do I cast a JSON object to a typescript class
... object has all the properties of a typescript class (by design). How do I cast that received JSON object to a type var?
23...
How do I use the CONCAT function in SQL Server 2008 R2?
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I suggest you cast all columns before you concat them
cast('data1' as varchar) + cast('data2' as varchar) + cast('data3' as varchar)
This should work for you.
s...
Value of type 'T' cannot be converted to
... the compiler doesn't know that T is string.
Therefore, it doesn't let you cast. (For the same reason that you cannot cast DateTime to string)
You need to cast to object, (which any T can cast to), and from there to string (since object can be cast to string).
For example:
T newT1 = (T)(object)"so...
Is it possible to cast a Stream in Java 8?
Is it possible to cast a stream in Java 8? Say I have a list of objects, I can do something like this to filter out all the additional objects:
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What is a void pointer in C++? [duplicate]
... it stores which kinds of objects, and therefore which type you can safely cast it to.
This construct is nothing like dynamic or object in C#. Those tools actually know what the original type is; void* does not. This makes it far more dangerous than any of those, because it is very easy to get it ...
Casting to string in JavaScript
I found three ways to cast a variable to String in JavaScript.
I searched for those three options in the jQuery source code, and they are all in use .
I would like to know if there are any differences between them:
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