arthur-e

def convex_hull_graham(points):
    '''
    Returns points on convex hull in CCW order according to Graham's scan algorithm. 
    By Tom Switzer <thomas.switzer@gmail.com>.
    '''
    TURN_LEFT, TURN_RIGHT, TURN_NONE = (1, -1, 0)

    def cmp(a, b):
        return (a > b) - (a < b)

arthur-e

/**
    Returns an object which can be used to calculate statistics on the
    the passed numeric Array.
 */
var Stats = function (arr) {
    arr = arr || [];

    // http://en.wikipedia.org/wiki/Mean#Arithmetic_mean_.28AM.29
    this.arithmeticMean = function () {
        var i, sum = 0;

arthur-e

# Clear out any old ppa's that might conflict
sudo rm /etc/apt/sources.list.d/*mapnik*
sudo rm /etc/apt/sources.list.d/*developmentseed*
sudo rm /etc/apt/sources.list.d/*chris-lea*

# Add new ppa's
echo 'yes' | sudo apt-add-repository ppa:chris-lea/node.js
echo 'yes' | sudo apt-add-repository ppa:mapnik/nightly-trunk

# Update