ryandgoldenberg1

# Adapted from Wikipedia page here: https://en.wikipedia.org/wiki/Cross-entropy_method
import numpy as np


def cem(mean, variance, maxits, num_samples, num_keep, objective_fn):
    for t in range(1, maxits + 1):
        # Sample according to current distribution
        x = np.random.normal(loc=mean, scale=np.sqrt(variance), size=num_samples)

        # Evaluate samples

ryandgoldenberg1

require 'set'

class Set
  def to_csv
    self.reduce("") do |accum, el|
      accum << ",#{el}"; accum
    end[1..-1]
  end
end

ryandgoldenberg1

var InfiniteScrollMixin = {
  SCROLL_RATIO: 0.75,
  CONTAINER: window,
  CONTENT: document,

  componentDidMount: function() {
    this._fetchInitialData();
    $(this.CONTAINER).on("scroll", this._onScroll);
  },

ryandgoldenberg1

require 'colorize'

class Tile
  attr_reader :value, :given

  def initialize(value = 0)
    @value = value
    @given = value != 0
  end

ryandgoldenberg1

class Maze
  attr_accessor :data, :workqueue, :seen, :start, :finish, :solution


  def initialize(filename)
    @data = read_data(filename)
    @start = find_letter("S")
    @finish = find_letter("E")
    @workqueue = [ Node.new(start, [start]) ]
    @seen = [start]

ryandgoldenberg1

class EightQueens
  def initialize
    @workset = (0...64).map { |i| [i] }
  end

  def queen_attacks(pos)
    (horizontal_attacks(pos) +
    vertical_attacks(pos) +
    main_diagonal_attacks(pos) +
    secondary_diagonal_attacks(pos)).uniq

ryandgoldenberg1

require 'open-uri'

# first argument: file containing uscf id numbers
# second argument: file you wish to write ratings to
if ARGV.length < 2 then return nil end

# gets unofficial rating
def get_rating(id)
	# opens page for corresponding to id number
	f = open("http://www.uschess.org/msa/MbrDtlTnmtHst.php?#{id}")

ryandgoldenberg1

class Sudoku

  	# board should be a string with numbers and dashes for spaces
	def initialize(board)
		@board = board.chars.to_a
	end
	
	# prints board
	def show
		(0...9).each {|r|