Lightweight Observer is an alternative to Announcement, the default Pharo implementation of the Observer Design Pattern. I started developing Lightweight Observer because I needed a small framework, with an implementation that can be easily converted to Javascript using PharoJS. I also wanted to be straight forward to use. I had in mind beginners such as […]
Tag: Pharo
Farmers Market App: Find Fresh Locally Grown Food
If you care both about the planet and your health, the Farmers Market app is for you! This app allows you to find nearby markets, where you can buy fresh food directly from farmers. Most of the produce are grown locally. This means less fuel for transportation. So, by buying locally grown food you contribute […]
How to Make a Large Lighthouse Using a Cheap 3D Printer
As a Pharo addict, making a 3D printed lighthouse is a fun week-end project. This idea is even more attractive. It’s a project that goes beyond what can be done using a small 3D printer, with a single extruder. The requirement are the following: The lighthouse can be taller than the maximum printing height. The […]
Nao Humanoid Robot Can Write Arbitrary Text
Some of my students worked on this project. They used Pharo, ROS, as well as Choregraphe to make Nao write arbitrary text. Since the robot motion is not very precise, they made up a simple but smart solution to allow the robot can push the page after writing each letter. Source code is available on […]
Hello World in Pharo
The best first post for a software developer is a ‘Hello World’ program. For this, I’m using my favorite programming language: Pharo. Transcript cr; show: ‘Hello World!’