Lecture 3 - Page 3 : 43

Programming Paradigms Simulation of other Paradigms and Continuations * Object-oriented Programming Functions and closures revisited Classes and objects A general pattern of classes Example of the general class pattern A general pattern of classes with inheritance An example of classes with inheritance The interpretation of self A general pattern of a class hierarchy with virtual methods An example of virtual methods Summing up: Simulation of OOP in Scheme * Imperative Programming Imperative Programming in a Functional Language Sequential Control Jumps in Functional Programs Selection Control Iterative Control Assignments in Functional Programs State in Functional Programs Object Mutation * Continuations Introduction and motivation The catch and throw idea A catch and throw example The intuition behind continuations Being more precise The capturing of continuations Capturing, storing, and applying continuations Use of continuations for escaping purposes Practical example: Length of an improper list Practical example: Searching a binary tree * Continuation Passing Style Continuation Passing Style Observations about continuation passing style * Coroutines Coroutines Simulating Coroutines in Scheme A simpel producer and consumer Simultaneous traversal of two binary trees (1) Simultaneous traversal of two binary trees (2) * Trampolining Trampolining More exercises

The definition of a 'class Point ' with methods getx , gety , add , and type-of.

On this page we have also defined the syntactical convenience function send that sends a message to an object. In Racket be sure that you define send before Point (such that send in the add method refers to our send , and not an already existing and unrelated definition of the name send ).

The send method which is used in the Point class.

The function apply calls a function on a list of parameters. This should be seen in contrast to a normal call, in which the individual parameters are passed.

Points and Rectangle