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@taboularasa
Created May 4, 2021 02:32
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implement caesar cipher
def transpose(message, mapping)
message.chars.map {|e| mapping[e]}.join
end
puts "encode or decode?"
selected_action = gets.chomp
puts "what is the key?"
key = gets.chomp
puts "what is your message?"
message = gets.chomp
plain = ('a'..'z').to_a
rotated = plain.rotate(key.to_i)
encode_mapping = plain.zip(rotated).to_h.tap {|h| h[" "] = " "}
actions = {
"encode" => encode_mapping,
"decode" => encode_mapping.invert
}
transposed_message = transpose(message, actions[selected_action])
puts "this is your modified message: #{transposed_message}"
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