Embedly Challenge #2

gistfile1.rb

require 'rubygems'
require 'hpricot'
require 'net/http'

def standard_deviation arr
	mean = arr.each.inject(0) {|sum, i| sum += i; sum} / arr.length.to_f
	new_arr = arr.each.map{|i| (i - mean) ** 2}
	(new_arr.each.inject(0) {|sum, i| sum += i; sum} / new_arr.length.to_f) ** 0.5
end

@depth = []

def find element, level
	element.search("/").each do |r|
		if r.name == "p"
			@depth << level
		else
			find r, level + 1
		end
	end
end

page = Net::HTTP.get_response(URI.parse("http://apply.embed.ly/static/data/2.html")).body
hp = Hpricot(page)
hp.search("article").each do |row|
	find row, 1
end

puts standard_deviation @depth