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Ports - Kasey #43

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10 changes: 9 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 +5,13 @@
# 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
sum = 0
exp = binary_array.length - 1
binary_array.each do |x|
if x == 1
sum += 2 ** exp
end
exp -= 1
end
return sum
end
7 changes: 4 additions & 3 deletions specs/binary_to_decimal_spec.rb
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
require 'minitest/autorun'
require 'minitest/reporters'
require_relative '../lib/binary_to_decimal'

require "minitest/autorun"
require "minitest/reporters"
require_relative "../lib/binary_to_decimal"

describe "binary to decimal" do
it "From 10011001 to 153" do
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