Calculate the area of non-self-intersecting polygons.
A tiny JavaScript function (103 bytes) calculates the area of a simple, non-self-intersecting polygon. Please note that the calculation is wrong if the polygon is self-intersecting.
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Created by Thiemo Mättig in January 2012 for 140byte.es. Inspired by areaTriangle by @neizod. Thanks to @tsaniel for saving 1 byte.Show the source of this page or visit the Gist at GitHub.