I used this web site for many years to run my college and university classes when I was a professor. I try to put interesting things on this site.

• 2022-05-30: Automatic language translation errors
• 2022-05-30: Three errors puzzle

One of my research interest is in complex text formatting systems whose goal is to make it easy to create documents, presentations, web pages, images, programs, etc., in an integrated manner while handling redundancies in a convenient and powerful manner. When not developing content for classes, etc., I create content to help with the development of these text formatting concepts. Here are some recent additions.

• 2022-03-08: Data science: Python (consolidated from data science course)
• 2022-03-08: Data science: topics (consolidated from data science course)


• 2021-03-06: Hello world in many languages (updated to show more languages being generated from from the same higher-level notation)
• 2021-03-07: The XOR operation and one-time pads

https://ascue.org

• 2022-06-14: Some fallacies in programming and teaching beginning programming that can be avoided before becoming a learned habit
• 2022-06-14: Some ways to think about programming a computer without thinking like a computer

Here are links to the topic series of representing and processing data.

• Summarizing book names and word count data
• Ways to represent table data

R examples:

• R: Bar chart from hard-coded data
• R: Bar chart from CSV
• R: Bar chart from JSON
• R: Bar chart from XML

Python examples:

• Python: Bar chart from text and CSV
• Python: Bar chart from JSON
• Python: Bar chart from XML
• Python: Bar chart from CSV using Pandas
• Python: Bar chart from JSON using Pandas

JavaScript and D3 examples:

• JavaScript: SVG bar chart using D3

Julia examples:

• Julia: Bar chart from JSON data using StatsPlots

... more to be added ...

Here are links to a series on recursive maze generation and visualization

• 2021-02-19: Maze algorithm explanation using GIF images
• 2021-02-22: Lua: Maze generation with static SVG
• 2021-02-24: JavaScript: Maze generation with dynamic SVG
• 2021-02-27: JavaScript: Maze generation with dynamic SVG and D3
• 2021-02-25: R: Maze generation using grid
• 2021-03-04: Julia: Maze generation using Luxor
• 2021-02-26: Python: Maze generation using PIL
• 2021-03-04: Java: Maze generation using AWT
• 2021-03-02: C#: Maze generation

(more coming)

• 2021-02-18: In-line SVG image-like scaling with GIF comparison
• 2021-02-17: SVG canvas,polygon, buttons and JavaScript

The following are related topics.

• 2020-11-28: Triangular numbers
• 2020-11-27: Pythagorean theorem
• 2020-11-27: Height of a regular triangle
• 2020-11-27: Non-rational number approximation
• 2020-11-27: Number 153: number of the fish

(to help locate items on this site)

• 2019-04-19: Scalability
• 2019-04-05: Compilers and fixed points