One of the features of JavaScript is the ability to create a mixin: An object that combines the functionality of several other objects. Mixins are one strategy for avoiding the problems associated ...

Given the reader interface, you can now use other classes - even ones outside the data class hierarchy - as readers, as long as they support the reader interface. Using the abstract reader interface ...

You will build a class that encapsulates these operations so that they can be called as methods on any given data set. Because of this, the class itself should represent a data set. Before you can ...