Playfair cipher: Difference between revisions
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→{{header|Julia}}
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# Translate key into an encoding 5x5 translation matrix.
keyletters = unique([c for c in canonical(key * "ABCDEFGHIJKLMNOPQRSTUVWXYZ")])
m = Char.((reshape(UInt8.(keyletters[1:25]), 5, 5)'))
# encod is a dictionary of letter pairs for encoding.
encod = Dict()
# Map pairs in same row of matrix m.
for i in 1:5, j in 1:5, k in 1:5
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