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When to use Cast() and Oftype() in Linq
...ly the elements that can safely be cast to type x.
Cast - will try to cast all the elements into type x. if some of them are not from this type you will get InvalidCastException
EDIT
for example:
object[] objs = new object[] { "12345", 12 };
objs.Cast<string>().ToArray(); //throws InvalidCas...
S3 - Access-Control-Allow-Origin Header
Did anyone manage to add Access-Control-Allow-Origin to the response headers?
What I need is something like this:
24 Ans...
C programming in Visual Studio
...17396
From the link above:
By default, the Visual C++ compiler treats all files that end in .c as C source code, and all files that end in .cpp as C++ source code. To force the compiler to treat all files as C regardless of file name extension, use the /Tc compiler option.
That being said, I ...
Union Vs Concat in Linq
...mpare references of items. Your items have different references, thus they all are considered different. When you cast to base type X, reference is not changed.
If you will override Equals and GetHashCode (used to select distinct items), then items will not be compared by reference:
class X
{
...
AngularJS: Understanding design pattern
...a and display.
Models are prime candidates for unit testing, as they typically have exactly one dependency (some form of event emitter, in common case the $rootScope) and contain highly testable domain logic.
Model should be considered as an implementation of particular unit.
It is based on singl...
Formatting floats without trailing zeros
...ptimization is bad, but it's because the OP's trick requires you to remove all zeroes THEN all decimals and then NOT MORE ZEROS. Gabriel's approach just removes all zeros and periods until it hits something else.
– Scott Stafford
May 11 at 14:47
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
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They are essentially equivalent to each other (in fact this is how some databases implement DISTINCT under the hood).
If one of them is faster, it's going to be DISTINCT. This is because, although the two are the same, a query optimizer wo...
Can you “ignore” a file in Perforce?
...rectory named "foo" (located at your project root), and you wish to ignore all .dll files in that directory tree, you can add the following lines to your workspace view to accomplish this:
-//depot/foo/*.dll //CLIENT/foo/*.dll
-//depot/foo/.../*.dll //CLIENT/foo/.../*.dll
The first line removes ...
Automatic text translation at MSDN pages - How to turn off?
...addon. Create a new redirect and set it up like this:
It will automatically redirect all msdn requests to english non-translated versions.
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chrome undo the action of “prevent this page from creating additional dialogs”
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No. But you should really use console.log() instead of alert() for debugging.
In Chrome it even has the advantage of being able to print out entire objects (not just toString()).
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