2021-01-21 13:40:28 +01:00
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<title>.</title>
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</head><body>
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<p><span class="h1">Unu: Simple, Literate Source Files</span>
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<br/><br/>
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2021-05-17 19:04:42 +02:00
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Retro is written in a literate style. Most of the sources
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2021-01-21 13:40:28 +01:00
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are in a format called Unu. This allows easy mixing of
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commentary and code blocks, making it simple to document
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the code.
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<br/><br/>
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As an example,
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<br/><br/>
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<tt class='indentedcode'># Determine The Average Word Name Length</tt>
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<br/><br/>
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<tt class='indentedcode'>To determine the average length of a word name two values</tt>
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<tt class='indentedcode'>are needed. First, the total length of all names in the</tt>
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<tt class='indentedcode'>Dictionary:</tt>
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>#0 [ d:name s:length + ] d:for-each</tt>
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<tt class='indentedcode'>~~~</tt>
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<br/><br/>
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<tt class='indentedcode'>And then the number of words in the Dictionary:</tt>
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>#0 [ drop n:inc ] d:for-each</tt>
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<tt class='indentedcode'>~~~</tt>
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<br/><br/>
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<tt class='indentedcode'>With these, a simple division is all that's left.</tt>
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>/</tt>
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<tt class='indentedcode'>~~~</tt>
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<br/><br/>
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<tt class='indentedcode'>Finally, display the results:</tt>
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<br/><br/>
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>'Average_name_length:_%n\n s:format s:put</tt>
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<tt class='indentedcode'>~~~</tt>
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<br/><br/>
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This illustrates the format. Only code in the fenced blocks
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(between ~~~ pairs) get extracted and run.
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<br/><br/>
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(Note: this only applies to source files; fences are not used
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when entering code interactively).
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<br/><br/>
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<span class="h2">On The Name</span>
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<br/><br/>
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The name Unu comes from the Maori language, where it means:
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<br/><br/>
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<tt class='indentedcode'>(verb) (-hia) pull out, withdraw, draw out, extract.</tt>
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<tt class='indentedcode'>Taken from https://maoridictionary.co.nz/</tt>
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</p>
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</body></html>
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