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Test if string is a number in Ruby on Rails
...ds on the ratio of false cases expected.
If they are relatively uncommon casting is definitely fastest.
If false cases are common and you are just checking for ints, comparison vs a transformed state is a good option.
If false cases are common and you are checking floats, regexp is probably the wa...
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
...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
...
Tired of casting lambdas over and over?
public sealed class Lambda<T>
{
public static Func<T, T> Cast = x => x;
}
public class Example
{
public void Run()
{
// Declare
var c = Lambda<Fun...
is it possible to select EXISTS directly as a bit?
...und.
If you must return a conditional bit 0/1 another way is to:
SELECT CAST(
CASE WHEN EXISTS(SELECT * FROM theTable where theColumn like 'theValue%') THEN 1
ELSE 0
END
AS BIT)
Or without the cast:
SELECT
CASE
WHEN EXISTS( SELECT 1 FROM theTable WHERE theColumn LIKE 'the...
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
...
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();
...
Cast List to List in .NET 2.0
Can you cast a List<int> to List<string> somehow?
8 Answers
8
...
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
...
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
...
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:
...