For anyone curious here is a neat filter option to grab a random tiddler
from a list:
<$list filter="[tag[quote]sample[3]]">
<$transclude/>
</$list>
will show you three random tiddlers with the quote tag.
/*\
title: $:/filters/sample.js
type: application/javascript
module-type: filteroperator
Filter to return random set from the current list.
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Export our filter function
*/
exports.sample = function(source,operator,options) {
var sampleIndex;
var allTitles = [];
var samples = [];
var numberOfSamples = parseInt(operator.operand) || 1;
source(function(tiddler,title) { allTitles.push(title); });
if (numberOfSamples >= allTitles.length) { return allTitles; }
for (var i = 0; i < numberOfSamples; i++) {
sampleIndex = Math.floor(Math.random() * allTitles.length);
samples = samples.concat(allTitles.splice(sampleIndex, 1));
}
return samples;
};
})();
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