How do you use polymorphism instead of conditionals?

How do you use polymorphism instead of conditionals?

Replace Conditional with Polymorphism

1. Step 1 is to make sure the switch statement is in a method of its own.
2. Step 3 is to create a subclass for each leg of the conditional, overriding the parent calculateRate method.
3. Step 4 is to turn ProjectRateType into either an interface or abstract class.

What is one benefit of replacing conditionals with polymorphism?

Removes duplicate code. You get rid of many almost identical conditionals. If you need to add a new execution variant, all you need to do is add a new subclass without touching the existing code (Open/Closed Principle).

How is polymorphism like a switch statement?

The same cases occur on each, but can’t be moved to a single function because the operation blocks are different. Polymorphism reduces the amount of code by forcing the compiler to write the switch statements and making it easier for the programmer to share common operation blocks via inheritance.

Which is not a type of constructor?

Which of the following is not a type of Constructor? Explanation: Friend function is not a constructor whereas others are a type of constructor used for object initialization. Explanation: Friend function is not a member of the class.

What is Polymorphism object oriented programming?

Polymorphism is a feature of object-oriented programming languages that allows a specific routine to use variables of different types at different times. Polymorphism is the ability of a programming language to present the same interface for several different underlying data types.

Should you avoid switch statements?

IMO switch statements are not bad, but should be avoided if possible. One solution would be to use a Map where the keys are the commands, and the values Command objects with an execute() method. Or a List if your commands are numeric and have no gaps.

Are switch statements Bad?

Switch case is not a bad syntax, but its usage in some cases categorizes it under code smell. It is considered a smell, if it is being used in OOPS. Thus, Switch case should be used very carefully.

What is the benefit of polymorphism?

Advantages of Polymorphism It helps the programmer to reuse the codes, i.e., classes once written, tested and implemented can be reused as required. Saves a lot of time. Single variable can be used to store multiple data types. Easy to debug the codes.

In which situations would you use polymorphism?

The reason why you use polymorphism is when you build generic frameworks that take a whole bunch of different objects with the same interface. When you create a new type of object, you don’t need to change the framework to accommodate the new object type, as long as it follows the “rules” of the object.

Which of the following is correct about dynamic polymorphism?

Which of the following is correct about dynamic polymorphism? Explanation: The conflict between which function to call is resolved during the run time in dynamic polymorphism i.e. the conflict is resolved when the execution reaches the function call statement.