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► KB ► To/From Guides ► Corel Paradox

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Overloading (Corel Paradox and Java Cross Reference Guide)

By Mike Prestwood

Corel Paradox versus Java: A side by side comparison between Corel Paradox and Java.

Language Details

Language Details is kind of a catch all for stuff that didn't make it into language basics nor any other category.

Overloading

[Other Languages]

Types of overloading include method overloading and operator overloading.

Method Overloading is where different functions with the same name are invoked based on the data types of the parameters passed or the number of parameters. Method overloading is a type of polymorphism and is also known as Parametric Polymorphism.

Operater Overloading allows an operator to behave differently based on the types of values used. For example, in some languages the + operator is used both to add numbers and to concatenate strings. Custom operator overloading is sometimes referred to as ad-hoc polymorphism.

Corel Paradox:

Paradox & Overloading

Operator - No.
Method - No.

However, you can have the same named method or procedure so long as they are in different libraries. This is important if you use libraries in a class-like OOP way and wish to implement some form of polymorphism (i.e. libMember.Open and libVendor.Open). This is an OOP-like technique for implementing a subtyping-like polymorphism which is also known as inclusion polymorphism.

Also, some developers like to pass an array and then handle the array for a pseudo technique. Although not overloading, it's useful.

ObjectPAL Overloading 1 certification question.

Java:

Java Overloading

Operator - No. Sun deliberately chose not include operator overloading in the Java language.
Method - Yes.

Java Overloading