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Binary-to-decimal conversion method by Victoria Garcia (Ampers) #36

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Binary-to-decimal conversion method by Victoria Garcia (Ampers) #36

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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
decimal_value = 0
# Note: The input array has to be reversed in order for the
# algorithm I devised in class to work.
binary_array.reverse!
binary_array.each_with_index do |bit, index|
bit_value = bit * (2 ** index)
decimal_value = decimal_value + bit_value
end
return decimal_value
end
6 changes: 6 additions & 0 deletions specs/binary_to_decimal_spec.rb
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Expand Up @@ -2,6 +2,12 @@
require 'minitest/reporters'
require_relative '../lib/binary_to_decimal'

# Edited this to allow use of mintest reporters. Made no other
# edits.

Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new


describe "binary to decimal" do
it "From 10011001 to 153" do
binary_array = [1, 0, 0, 1, 1, 0, 0, 1]
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