gistfile1.coffee

# coffeescript, deps include node ~v0.6.6, jsdom, jQuery (node version)

fs = require 'fs'
jsdom = require 'jsdom'

data = []
deviation = []
sum = 0
devnsum = 0

do_std_dev = () ->
  sum = sum + num for num in data
  mean = sum/(data.length)
  for num in data
    deviation.push ((num - mean) * (num - mean))
    devnsum = devnsum + ((num - mean) * (num - mean))
  console.log Math.sqrt(devnsum/(data.length-1))


require('jsdom').env({html:fs.readFileSync('./2.html').toString(), done:((err, window) ->
  $ = require('jQuery').create(window)
  num_elem = $('p').length - 1
  $('p').each (i, element) ->
    data.push $(element).parents().length
    do_std_dev() if i == num_elem
)})