Hands-On Design Patterns and Best Practices with Julia

Understanding implementation inheritance

Implementation inheritance allows a subclass to inherit both fields and methods from its superclass. As Julia does not support implementation inheritance, we will switch language for a moment and present the following example in Java. Here is a class that provides a container for holding any number of objects:

import java.util.ArrayList;public class Bag{    ArrayList<Object> items = new ArrayList<Object>();    public void add(final Object object) {        this.items.add(object);    }    public void addMany(final Object[] objects) {        for (Object obj : objects) {            this.add(obj);        }    }}

The Bag class basically maintains a list of objects in the items field and provides two convenient functions, add and addMany, for adding a ...