Module: PrimeFactorization

Defined in:
lib/prime_factorization.rb,
lib/prime_factorization/version.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Instance Method Summary collapse

Instance Method Details

#factors(number) ⇒ Object 



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# File 'lib/prime_factorization.rb', line 4

def factors(number)
    result=[]
    i=2
    while i < number
      result << i if number % i == 0
      i+=1
    end
    return result
end

#prime_factorization(number) ⇒ Object 



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# File 'lib/prime_factorization.rb', line 31

def prime_factorization(number)
    primes = prime_factors(number)

    if primes.size == 0
      return "#{number} is a prime number"
    else
      used_primes={}
      primes.each do |prime|
        x=1
        while number > 1
          if number % prime == 0
            used_primes.[]=(prime,x)
            x+=1
            number /= prime
          else
            break
          end
        end
      end
      result=""
      powers = {2=>"\u00b2",3=>"\u00b3",4=>"\u2074",5=>"\u2075",
  6=>"\u2076",7=>"\u2077",8=>"\u2078",9=>"\u2079"}

  used_primes.each do |key,value|
    if value > 0
      if value == 1
        result << "#{key} * "
      elsif value < 9
        result << "#{key}#{powers[value]} * "
      else
        result << "#{key}^#{value} * "
      end
    end
  end

  result.chomp!(" * ")

    end
    
    return result

end

#prime_factors(number) ⇒ Object 



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# File 'lib/prime_factorization.rb', line 14

def prime_factors(number)
     all_factors=factors(number)
     result=[]
     all_factors.each do |factor|
       if result.size == 0
         result << factor
       else
         val=true
         result.each do |r|
           val = false if factor % r == 0
         end
         result << factor if val
       end
     end
     return result
end