By Tod Golding
The facility and magnificence of familiar varieties have lengthy been said. Generics enable builders to parameterize info varieties very similar to you will parameterize a mode. This brings a brand new size of reusability for your forms with out compromising expressiveness, type-safety, or potency. Now .NET generics makes this energy on hand to all .NET builders. by way of introducing common ideas at once into the typical Language Runtime (CLR), Microsoft has additionally created the 1st language-independent generics implementation. the result's an answer that enables commonplace forms to be leveraged through all of the languages of the .NET platform.
This publication explores all points of the .NET generics implementation, masking every thing from basic primary innovations, to the weather of time-honored syntax, to a broader view of ways and if you may perhaps follow generics. It digs into the main points linked to growing and eating your personal customary sessions, buildings, tools, delegates, and interfaces, studying all of the nuances linked to leveraging every one of those language constructs. The booklet additionally appears at guidance for operating with widely used forms, the functionality earnings accomplished with generics, the hot well-known box libraries (BCL and 3rd party), and key elements of the underlying .NET implementation.
For these transitioning from C++, the e-book offers an in-depth examine the similarities and alterations among templates and.NET generics. It additionally explores the syntactic adaptations linked to utilizing generics with all of the .NET languages, together with C#, visible simple, J#, and C++.
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Extra info for Professional .NET 2.0 Generics
So, when I look at these two examples, I see the added syntax introduced by generics as a blessing. I don’t see it as muddying the profile of my method. Instead, I see it as adding a much-needed means of qualifying, in detail, the nature of my types. 32 Valuing Type Safety The truth is, generics should allow you to demand much more from the APIs you consume and expose. When an API hands you back an ArrayList, what is it really telling you? ” It then becomes your job to track down, sometimes through multiple levels of indirection, the code that created and populated the ArrayList to determine what it contains.
SayHello(); All that’s left now is to run this code and you’ll see the multilingual “Hello World” break through all new international barriers. ), this example does help to clarify the basic steps that are involved in building and consuming a simple generic type. A More Conceptual View At this stage, it’s my hope that you have a much better feeling for why the term generics was coined to describe this language feature. Generics bring a new level of generality to your types, which allows you to separate the behavior of a class from the data types that it operates on.
If you happen to capture an exception here, and you want to continue processing additional items, you cannot use the continue construct. This whole idea of trying to adopt a strategy for dealing with the occurrence of InvalidCastExceptions seems like it’s focusing on the wrong dimension of the problem. If you weren’t forced to use unsafe types, you wouldn’t be in a position of having to coerce them to another type with the hope that the conversion 30 Valuing Type Safety is successful. Although I’m not saying casting should be eliminated, I am saying it’s something you should attempt to avoid.
Professional .NET 2.0 Generics by Tod Golding