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 ...

For example, the following code creates an example of the DDATA class representing the data set sasuser.x. The data set will be opened in input mode and has two variables.

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 ...