Prototyping 19 November 2012

The origin and theory of the cut-up, annotated audio, essay on ubuweb.

Shuffle

Javascript doesn't include a built-in function to shuffle an array, but there are lots of "recipes" to do it.

For instance: http://stackoverflow.com/questions/6274339/how-can-i-shuffle-an-array-in-javascript

var shuffle = function (o) {
    for (var j,x,i=o.length; i; j=parseInt(Math.random()*i), x=o[--i], o[i] = o[j], o[j] = x);
    return o;
}

Part 1: Audio cut-up

The BBC World Service produces and releases an hourly "headlines" recording

• audio feed (high quality)

• HTML5 media events (timeupdate, durationchange, seeked)

• HTML5 media events
• Live demo of HTML5 player events

Part 2: Headline scrambler

• Example of "walking the tree"
• DOM (childNodes, nodeType, nodeValue, nodeName?)
• Recursive tree / search