mindplace

def from_binary(number)
  number_array = number.to_s.chars.reverse
  returning = 0
  number_array.each_with_index do |item, i|
    location = 2 ** i
    returning += (location * item.to_i)
  end
  returning
end

mindplace

class RPNCalculator
  attr_accessor :calculator

  def initialize
    @stack = []
    @value = 0
  end

  def push(number)
    @stack << number

mindplace

def into_words(num)
  ones = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
  teens = ["eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"]
  tens = ["ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"]

  if num == 0
    return "zero"
  elsif num % 10 == 0 && num < 100
    return tens[(num / 10) - 1]
  elsif num < 20

mindplace

skippers = GlobalCohort.new("Fiery Skippers", Date.parse("8-February-2016"))
# => #<GlobalCohort:0x007f956c09bc40 @local_cohorts=[], @students=[], @name="Fiery Skippers", @p0_start_date=#<Date: 2016-03-08 ((2457456j,0s,0n),+0s,2299161j)>>

nyc = LocalCohort.new("New York", skippers)
chicago = LocalCohort.new("Chicago", skippers)
sanfran = LocalCohort.new("San Francisco", skippers)

skippers.add_local_cohort(nyc)
skippers.add_local_cohort(chicago)
skippers.add_local_cohort(sanfran)

mindplace

class Student < LocalCohort
  attr_reader :student_name, :email, :history, :local_cohort

  def initialize(student_name, email, local_cohort)
    @student_name, @email, @local_cohort = student_name, email, local_cohort
    @history = []
  end

  def grade
    events = history.select{|event| event[1].is_a?(Fixnum)}

mindplace

class LocalCohort < GlobalCohort
  attr_reader :city, :students, :global_cohort

  def initialize(city, global_cohort)
    @city, @global_cohort = city, global_cohort
    @students = []
  end

  def global_cohort_name
    global_cohort.name

mindplace

require 'date'

class GlobalCohort
  attr_reader :local_cohorts, :name, :p0_start_date

  def initialize(name, p0_start_date=nil)
    @local_cohorts = []
    @students = []
    @name = name
    @p0_start_date = p0_start_date.nil? ? Date.today : p0_start_date

mindplace

def get_range(max)
    range = [0, 0, 2]
    (3..max).each do |num|
        num.odd? ? (range << num) : (range << 0)
    end
    range
end

def sum_of_primes(max)
    range = get_range(max)

mindplace

function nthPrimeNumber(num) {
  var primes = [0, 0, 2];
  var max = Math.pow(10, 4);
  for (var i=3; i < max + 1; i++) {
    if (i % 2 == 0) {
      primes.push(0);
    } else {
      primes.push(i);
    }
  }

mindplace

def binary_search(array, item)
  index = nil
  found = false

  mid_point = array.length / 2
  before = 0
  after = 0

  while found == false
    if array.length < 2 || array[mid_point] == item