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Why is using a wild card with a Java import statement bad?
...m.mycompany.calendar.Event. If you import both using the wildcard method, one of these three things happens:
You have an outright naming conflict between java.awt.Event and com.mycompany.calendar.Event, and so you can't even compile.
You actually manage only to import one (only one of your two im...
Using python map and other functional tools
...
bad one when bars comes from the list
– Phyo Arkar Lwin
Nov 16 '12 at 13:14
59
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Namespace + functions versus static methods on a class
...l need to search for side effects in all its methods, including the static ones.
Extension I
Adding code to a class' interface.
In C#, you can add methods to a class even if you have no access to it. But in C++, this is impossible.
But, still in C++, you can still add a namespaced function, even...
How is malloc() implemented internally? [duplicate]
Can anyone explain how malloc() works internally?
3 Answers
3
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Why does the default parameterless constructor go away when you create one with parameters
...when you create a constructor taking parameters, the default parameterless one goes away. I have always just accepted this fact, but now I've started wondering why.
...
What is a stream?
...an be accessed in sequential order. Typical operations on a stream:
read one byte. Next time you read, you'll get the next byte, and so on.
read several bytes from the stream into an array
seek (move your current position in the stream, so that next time you read you get bytes from the new positio...
How does having a dynamic variable affect performance?
... call site is part of the Dynamic Language Runtime. The DLR says "hmm, someone is attempting to do a dynamic invocation of a method foo on this here object. Do I know anything about that? No. Then I'd better find out."
The DLR then interrogates the object in d1 to see if it is anything special. Ma...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...ing a MOV shifts the subsequent instructions to different memory addresses
one of those moved instructions was an important conditional branch
that branch was being incorrectly predicted due to aliasing in the branch prediction table
moving the branch eliminated the alias and allowed the branch to b...
ViewBag, ViewData and TempData
...apper around ViewData and exists only in ASP.NET MVC 3.
This being said, none of those two constructs should ever be used. You should use view models and strongly typed views. So the correct pattern is the following:
View model:
public class MyViewModel
{
public string Foo { get; set; }
}
A...
What is an existential type?
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When someone defines a universal type ∀X they're saying: You can plug in whatever type you want, I don't need to know anything about the type to do my job, I'll only refer to it opaquely as X.
When someone defines an existential ty...