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Hexadecimal to Decimal Terminal Script

/ Published in: Ruby
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  1. def hex_to_decimal(x)
  2.   x = x.upcase.scan(/[0-9A-F]/).reverse
  3.   y = 0
  4.   z = 0
  5.   i = 0
  6.   x.each do |n|
  7.     x[i] = case n
  8.     when 'A'
  9.       then x[i] = 10
  10.     when 'B'
  11.       then x[i] = 11
  12.     when 'C'
  13.       then x[i] = 12
  14.     when 'D'
  15.       then x[i] = 13
  16.     when 'E'
  17.       then x[i] = 14
  18.     when 'F'
  19.       then x[i] = 15
  20.     else
  21.       n = n.to_i
  22.     end
  23.     z = z + (n * (16**y))
  24.     y += 1
  25.     i += 1
  26.   end
  27.   z
  28. end
  29.  
  30. number = gets.chomp
  31. puts hex_to_decimal(number)

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