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How to determine if a type implements a specific generic interface type
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why not just cast to IBar<SomeClass> and check for null? (I mean casting with 'as' of course)
– Pablo Retyk
Feb 2 '09 at 14:04
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How to convert a Drawable to a Bitmap?
...n a conditional statement to check if it is indeed a BitmapDrawable before casting it: if (d instanceof BitmapDrawable) { Bitmap bitmap = ((BitmapDrawable)d).getBitmap(); }
– Tony Chan
Jul 9 '11 at 1:57
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Order of event handler execution
...store for a particular event. The default backing store for events, multi-cast delegates, are documented as executing in registration order. This will not change in a future framework version. What may change is the backing store used for a particular event.
– HappyNomad
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AddRange to a Collection
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Try casting to List in the extension method before running the loop. That way you can take advantage of the performance of List.AddRange.
public static void AddRange<T>(this ICollection<T> destination,
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Performing user authentication in Java EE / JSF using j_security_check
...regarding user authentication for a web application making use of JSF 2.0 (and if any components do exist) and Java EE 6 core mechanisms (login/check permissions/logouts) with user information hold in a JPA entity. The Oracle Java EE tutorial is a bit sparse on this (only handles servlets).
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Which method performs better: .Any() vs .Count() > 0?
...WHEN ( EXISTS (SELECT
1 AS [C1]
FROM [Table] AS [Extent1]
)) THEN cast(1 as bit) WHEN ( NOT EXISTS (SELECT
1 AS [C1]
FROM [Table] AS [Extent2]
)) THEN cast(0 as bit) END AS [C1]
FROM ( SELECT 1 AS X ) AS [SingleRowTable1]
that requires 2 scans of rows with your condition.
I don...
Invalid argument supplied for foreach()
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Please do not depend on casting as a solution,
even though others are suggesting this as a valid option to prevent an error, it might cause another one.
Be aware: If you expect a specific form of array to be returned, this might fail you. More chec...
How to get the Power of some Integer in Swift language?
...x errors, this works exactly how you expected it to. All you have to do is cast a and b to Double and pass the values to pow. Then, if you're working with 2 Ints and you want an Int back on the other side of the operation, just cast back to Int.
import Darwin
let a: Int = 3
let b: Int = 3
let x:...
String comparison using '==' vs. 'strcmp()'
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this is beacuse using '==' if one of the two operands is castable to number, php casts both the operands to numbers, and more, if a not number string is casted to number, it takes value zero, resulting equals to zero, so the result of the comparison with simple '==' can something u...
Comparing boxed Long values 127 and 128
...val4); // true
(Proper null checking is necessary, even for castings)
IMO, it's always a good idea to stick with .equals() methods when dealing with Object comparisons.
Reference links:
https://today.java.net/pub/a/today/2005/03/24/autoboxing.html
https://blogs.oracle.com/darcy/en...