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first working version #40

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first working version #40

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11 changes: 10 additions & 1 deletion lib/binary_to_decimal.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -5,5 +5,14 @@
# Calculate and return the decimal value for this binary number using
# the algorithm you devised in class.
def binary_to_decimal(binary_array)
raise NotImplementedError
decimal_number = 0
exponent = binary_array.length - 1
binary_array.each do |digit|
if digit == 1
decimal_number += 2**exponent
end
exponent -= 1
end
return decimal_number
end
puts "#{binary_to_decimal([1, 0, 0, 1, 1, 0, 0, 1])}"