annatomka

function calculateAllCrossProduct(points) {
    var lastSign = null;

    for (var i = 2; i < points.length; i++) {
        //calculate crossproduct from 3 consecutive points
        var crossproduct = calculateCrossProduct(points[i - 2], points[i - 1], points[i]);
		console.log(i + ". crossproduct from ("+ points[i - 2].x +" "+points[i - 1].x +" "+points[i].x +"): " + crossproduct);
        var currentSign = Math.sign(crossproduct);
        if (lastSign == null) {
        	//last sign init

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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