Package conditions (encapsulate Conditional)

encapsulation is the abstraction of related methods or properties into an object. The meaning of encapsulation:

1. External hidden internal implementation, the interface is unchanged, the internal implementation of free modification.
2. Only the data and methods that are needed are returned.
3. Provides a way to prevent data from being modified.
4. Better code reuse.

In order to improve the readability and maintainability of the code, we can encapsulate the conditions when the code contains a lot of conditional judgments. There are two kinds of encapsulation methods: first, no parameter condition judgment, encapsulation is the pre-reconstruction code of the property.

 Public classRemotecontrol {Private string[] Functions {Get;Set; } Private stringName {Get;Set; } Private intCreatedyear {Get;Set; }  Public stringPerformcoolfunction (stringbuttonpressed) {            //determine if we are controlling some extra function//That requires special conditions            if(Functions.length >1&& Name = ="RCA"&& createdyear > DateTime.Now.Year-2)                return "dosomething"; }    }

Post-Refactoring Code

 Public classRemotecontrol {Private string[] Functions {Get;Set; } Private stringName {Get;Set; } Private intCreatedyear {Get;Set; } Private BOOLhasextrafunctions {Get{returnFunctions.length >1&& Name = ="RCA"&& createdyear > DateTime.Now.Year-2; } }         Public stringPerformcoolfunction (stringbuttonpressed) {            //determine if we are controlling some extra function//That requires special conditions            if(hasextrafunctions)return "dosomething"; }    }

Second, the parameters of the conditional judgment, encapsulation as a method of reconstruction before the code

  Public classRemotecontrol {Private string[] Functions {Get;Set; } Private intCreatedyear {Get;Set; }  Public stringPerformcoolfunction (stringbuttonpressed) {            //determine if we are controlling some extra function//That requires special conditions            if(Functions.length >1&& buttonpressed=="RCA"&& createdyear > DateTime.Now.Year-2)                return "dosomething"; }    }

Post-Refactoring Code

  Public classRemotecontrol {Private string[] Functions {Get;Set; } Private stringName {Get;Set; } Private intCreatedyear {Get;Set; } Private BOOLHasextrafunctions (stringbuttonpressed) {Get{returnFunctions.length >1&& buttonpressed=="RCA"&& createdyear > DateTime.Now.Year-2; } }         Public stringPerformcoolfunction (stringbuttonpressed) {            //determine if we are controlling some extra function//That requires special conditions            if(Hasextrafunctions (buttonpressed))return "dosomething"; }    }

Package conditions (encapsulate Conditional)