Script Recycling!

Goals:

Store reusable parts of your programs in separate files that you can easily import and run in any program whenever you need it

CoffeeScript.load reads, compiles, and executes CoffeeScript code stored in a separate file named with a .coffee extension.
CoffeeScript.load executes the code in a nested scope. To make values from that nested scope available in the current scope, assign them to properties of the window object, as illustrated here with the custom print function.

Code reuse is central to efficient coding. Recall that functions facilitate code reuse by allowing us to reuse a block of code through a simple function call. Such code reuse reduces the potential for bugs and simplifies code maintenance. This lesson shows how to take this code-recycling to the next level, by making useful functions (and/or other code) readily available to any program we write.

A file of pre-written code such as CrazyLetters.coffee is called a module. By defining modules based on specific tasks, use of modules can help us keep our code organized as well.

Save each of the following in a folder called ScriptRecycling.

Pencil Code creator David Bau wrote a module that contains code which modifies the behavior of the rt and lt functions, so that the default turtle annotates each turn that it makes. A copy of this code is located at
https://hacker.pencilcode.net/home/lib/showangle.coffee
Load the script and instruct your default sprite to create an AnnotatedShape, such as a polygon or a star.
CrazyLetters: The coding snippet in this lesson illustrates solving the CrazyLetters activity using a modular approach. Copy the snippet (creating two files) and make sure it works. Then add a second function to the module, jiggle, which makes all the crazy letters move randomly around their initial positions. Hint: use the jQuery class selector for the turtlelabel class to identify the labels, and use speed Infinity to avoid animation queue problems.
Write a program that shares several of your finest drawing programs as an ArtShow. Load and execute the scripts, one after the other, in the same window. Begin by creating an array that contains the URLs of the files . Recall, however, that to execute scripts using CoffeeScript.load, the file name needs to end with .coffee. Accomplish this programmatically, using the load function to read the source code and save to immediately save it as a temporary file with the required filename extension. Then pass that file to CoffeeScript.load.