This demonstrates building an implementation of Conway's Game of Life in ClojureScript. On the way, it shows how to build operations in ClojureScript, and how easy it can be to build a web application.
The math, along with the description, is a direct copy of the REPL driven development of the Life in APL video
As with many ClojureScript applications, this one requires the [Leiningen]|(https://leiningen.org) build tool. Go ahead and install it. We'll wait.
To run the demo, run:
lein figwheel
Figwheel will complain about referenced vars that aren't defined, but these warnings can be ignored.
Next, connect a browser to http://localhost:3449
The program takes the user through a series of screens in which each step of implementing the code is built providing the user with interactive text to execute, with the results displayed on the page. The user can either execute the code as provided, or experiment if desired.
The pages initially take the user through linear algebra operations that duplicate the process shown in the APL video, showing how the same thing can be achieved in ClojureScript to calculate progress in Conway's Game of Life (CGoL). Then it shifts to generating the data structures that ClojureScript uses for generating web pages. Once this is done, the user can bring the the functions for CGoL to bear, and display it in the window.
To ease the operations for the user, and to closely mimic the APL process, a few library namespaces have been created.
life.matrix includes several matrix functions to help implement
the APL approach, such as an operation for converting boolean
true/false to 1/0. There are also other APL-style boolean operations
that work on 1/0 and can be applied to matrices.
life.display does simple printing of 2D, 3D and 4D matrices,
similarly to the disp function in the APL video.
life.web is the web application. This is the thing that first gets
run. It sets up React, creates an atom to contain application state
and renders the page whenever the application state changes.
life.page contains the functions for displaying the page. It also
contains the data and script for the demo.
live.evaluator contains the code for executing the script or user
typed commands.
Copyright © 2018 Paula Gearon
Distributed under the EPL 1.0 - the same as Clojure