Module 1

Introduction to Garbage Collectors and Object-Oriented Programming

This lecture will provide a basic understanding of Garbage Collectors (GC) and object-oriented programming (object, references, instantiation) using Pharo. We will present the syntax of the language and explore the Pharo environment. We will some tools to write and execute simple programs.

Code

• The code of the Swallow class in the Example.st file (Example package). Just drag-and-drop the file into the Pharo world and select Install into the image.

• At the end, the code in the Playground was

pepita := Swallow new.
pepita areYouTired.
pepita fly: 50.

Smalltalk garbageCollect.
Smalltalk vm totalGCTime. "2967" "3005"

Links of interest

• Download the Pharo: https://pharo.org/download
• Check the Pharo MOOC: https://mooc.pharo.org/
• Books about Pharo: https://books.pharo.org/

Practice

• Follow ProfStef in the Pharo image to learn how to use the environment.
• Extend the Swallow example (adding tests, adding features, etc).
• Or create a new program (model) that you want.