In Digital Cipher, encoding is done by the simple addition of numbers in the key and the corresponding characters on a string input.
Create a function that takes two arguments; a positive integer and a string and returns an encoded array of integers as message.
Assign a unique number to each letter of the alphabet.
a b c d e f g h i j k l m
1 2 3 4 5 6 7 8 9 10 11 12 13
n o p q r s t u v w x y z
14 15 16 17 18 19 20 21 22 23 24 25 26
There are some variations on the rules of encipherment. One version of the cipher rules are outlined below:
message = "scout"
key = 1939
digitalCipher(message, key) ➞ [20, 12, 18, 30, 21]
Write the corresponding number against each character:
s c o u t
19 3 15 21 20
Add to each obtained digit consecutive digits from the key:
s c o u t
19 3 15 21 20
+ 1 9 3 9 1
---------------
20 12 18 30 21
See the below example for a better understanding:
message = "masterpiece"
key = 1939
digitalCipher(message, key) ➞ [14, 10, 22, 29, 6, 27, 19, 18, 6, 12, 8]
m a s t e r p i e c e
13 1 19 20 5 18 16 9 5 3 5
+ 1 9 3 9 1 9 3 9 1 9 3
--------------------------------
14 10 22 29 6 27 19 18 6 12 8
digitalCipher("scout", 1939) ➞ [20, 12, 18, 30, 21]
digitalCipher("mubashir", 1990) ➞ [14, 30, 11, 1, 20, 17, 18, 18]
digitalCipher("innokodakademija", 100) ➞ [6, 4, 1, 3, 9, 20]
Liked this challenge ? Let's decode your encrypted version here!!!