Event-Based Programming: Taking Events to the Limit by Ted Faison

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By Ted Faison

Languages like C#, VB .NET, and Delphi contain integrated aid for occasions, and those occasions develop into very robust once they attach the gadgets and parts of a procedure. occasions ensure that such elements to engage with none coupling. And the ensuing components may be constructed and demonstrated separately which retains the code fresh and straightforward.

Component-based improvement (CBD) is an extension of object-oriented programming. CBD does away with the language and vendor-specific obstacles of OOP, makes software program reuse simpler and speeds up the improvement approach. Event-based programming is the following logical step in CBD, and makes parts extra reusable because of their decoupled nature. yet event-based platforms are more uncomplicated to improve, this means that they’re more affordable and extra trustworthy than conventional OOP or CBD platforms.

This booklet teaches you the way to enhance software program in response to components that have interaction basically via an occasion mechanism. You’ll easy methods to use occasions in lots of varied occasions, to unravel ordinary improvement difficulties with out coupling. The ebook introduces sign Wiring Diagram, a singular kind of software program diagram just like the circuit diagrams utilized by designers. The publication concludes with a sequence of case experiences, incorporating all featured innovations. In a nutshell, you’ll are looking to decide up a replica of this ebook simply because it:

* indicates how you can use an event-based paradigm to lessen or thoroughly dispose of coupling among sessions and elements
* Describes parts, together with coordinators, staff, developers, binders, and routers
* comprises 3 entire case reports that version strategies getting used to layout small, medium, and massive structures

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Additional resources for Event-Based Programming: Taking Events to the Limit

Example text

As mentioned, K-coupling between T1 and T2 doesn’t always occur when T1 references a typed constant defined in T2. K-coupling occurs only when certain types are involved. Exactly which types produce K-coupling depends on the programming language and the compiler. Referencing constants of built-in scalar types like Boolean, integer, float, and char generally causes K-coupling. NET, all value types, which include structures, cause K-coupling. Whether strings qualify for K-coupling depends on how the compiler treats constant strings.

T1 <> T2 vTa T3 Figure 1-16. Another example of ambiguous type coupling between T1 and T2 CHAPTER 1 ■ COUPLING In order for T1 to use an instance of T3 without creating it, T1 must receive a reference to the T3 instance from another object. T1 might be given a T3 instance as a parameter in a method call. Although T1 has no control over what type of object it gets (there might be several classes derived from T2), it knows one thing: The instance must be of type T2 or a type derived from T2.

Referencing constants of built-in scalar types like Boolean, integer, float, and char generally causes K-coupling. NET, all value types, which include structures, cause K-coupling. Whether strings qualify for K-coupling depends on how the compiler treats constant strings. Consider this C# example. MyString; } } The compiler can see that the string value in Class2 is constant. When compiling Class1, the compiler might be able to embed the characters of the string “whatever” somewhere in the executable code of the Class1.

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