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Creating algorithms

Including an algorithm in a page

An algorithm is stored in a single page in the Algorithm namespace. Different variants require different pages. For example Factorial recursive and Factorial iterative.

You include an algorithm on a different page using the algorithm tag. The last part of the tag is the title of the algorithm page.

[algorithm Fisher-Yates shuffle]

This transcludes the algorithm from Fisher-Yates shuffle.

Creating an algorithm page

An algorithm page is split into three sections: algorithm, support, and visualisation. Each of these sections contains code wrapped in <syntax> tags.

The basic outline of an algorithm page should look like this:

[algorithm my-algorithm]

====== Algorithm ======
<syntax js>

====== Support ======
<syntax js>

====== Visualisation ======
<syntax html>

The algorithm page should include itself, so that you can easily preview how your changes will work.


The 1st section contains the algorithm. This is the code that the user sees in the interactive environment.


The 2nd section contains the support code. This is support code, such as functions that the main algorithm uses. If it also includes a run() function this function is called when running the algorithm.

If the visualisation code contains a function args() then the return value of calling that function will be passed into the run function. This allows the visualisation to supply the input to the algorithm.


The 3rd section contains the visualisation code. This is a complete webpage that contains an update() function, which is called for every new line when running the algorithm. The update function takes two arguments, the current node in the AST and an execution context.

If the body tag has a height style attribute that size is used to size the visualisation.

creating_an_algorithm.1351056933.txt.gz · Last modified: 2015/02/02 08:24 (external edit)