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##########################
# => factorial iterative
##########################


def factorial_it(n)
	return (1..n).inject(:*)
end

#puts factorial(10)

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# actual funtion to get the prime factors
def prime_factors(n)
	primes = []
	
	until n == 1
		primes << prime_number(n)
		n /= primes.last
		puts "primes_array:#{primes.inspect} | n:#{n}"
	end

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def birthday_timestamp(yyyy,mm,dd)
	Time.new(yyyy,mm,dd)
end

#birthday_timestamp




def age(yyyy,mm,dd)

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# # Determine whether a string contains a Social Security number.
def has_ssn?(string)
  /\d{3}-\d{2}-\d{4}/.match(string)
end

# Return the Social Security number from a string.
def grab_ssn(string)
  string[/\d{3}-\d{2}-\d{4}/]
end

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def binary_search(num, array)

  return -1 if !array.include?(num)

  index = (array.length)/2

  index_array = [(array.length), 0]

  until num == array[index]
    index = (index_array[0] + index_array[1])/2

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$numbers_hash = {1 => "one", 2 => "two", 3 => "three", 4 => "four", 5 => "five", 6 => "six", 7 => "seven", 8 => "eigth", 9 => "nine", 10 => "ten", 
								 10 => "ten", 11 => "eleven", 12 => "twelve", 13 => "thirteen", 14 => "forteen", 15 => "fifteen", 16 => "sixteen", 17 => "seventeen", 
								 18 => "eighteen", 19 => "nineteen", 20 => "twenty", 30 => "thirty", 40 => "forty", 50 => "fifty", 60 => "sixty", 70 => "seventy", 
								 80 => "eighty", 90 => "ninty", 100 => "hundred", 1_000 => "thousand", 1_000_000 => "million", 1_000_000_000 => "billion",
								 1_000_000_000_000 => "trillion"}



def ransom_below_100(number,modifier,result)
	quotient,remainder = number.divmod(10)

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class Hospital

  attr_accessor :name, :employees, :patients

  def initialize(name, location)
    @name, @location, @employees, @patients = name, location, [], []
  end
end

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require 'yaml'


class TodoList < Hash

	def initialize(file_name)
		@file_name = file_name
		File.open( @file_name, 'w' ) { |file| YAML.dump( self, file )}
	end

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require 'optparse'

options = {date: false, sort: false, ddate: false, tag: false, prio: false}


optparse = OptionParser.new do|opts|
  opts.on("--date") do
    options[:date] = true
  end
  opts.on('--sort') do