kayline

# Determine whether a string contains a Social Security number.
def has_ssn?(string)
  #check overall length
  if string.length < 11
    return false
  #check for match
  elsif string.match(/\d{3}(-)\d{2}(-)\d{4}/)
    return true
  else
    return false

kayline

def reverse_words(str)
  array = []
  result = ""
  str.each_line(" ") { |s| array.push(s.reverse)}
  array.each do |i|
  result = result + i +" "
  end
  result = result.chop.lstrip
  puts result
  return result

kayline

class RPNCalculator
  
  def evaluate(input)
    puts "BEGIN NEW CALC"
    stack = [] 
    puts "Initial input is #{input}"
    until input == ""
      item = input.match(/\A\S*/)
      puts "Current item is #{item}"
      item_string = item.to_s

kayline

class Array
  
  def pad!(min_size, value = nil)
    array = self
    diff = min_size - self.length
    if diff <= 0
      return self
    else
      diff.times do 
       array.push(value)