Substitution cipher

Arturo

<lang rebol>key: ---]kYV}(!7P$n5_0i R:?jOWtF/=-pe'AD&@r6%ZXs"v*N[#wSl9zq2^+g;LoB`aGh{3.HIu4fbK)mU8|dMET><,Qc\C1yxJ---

encode: function [str][

   bs: new []
   loop split str 'ch ->
       'bs ++ to :string key \ (to :integer to :char ch)-32
   return join bs

]

decode: function [str][

   bs: new []
   loop split str 'ch ->
       'bs ++ to :string to :char (index key ch)+32
   return join bs

]

s: "The quick brown fox jumps over the lazy dog, who barks VERY loudly!"

enc: encode s print ["encoded:" enc] print ["decoded:" decode enc]

func encode(s string) string {
bs: = []byte(s)
for i: = 0; i < len(bs); i++ {
bs[i] = key[int(bs[i]) - 32]
}
return string(bs)
}

func decode(s string) string {
bs: = []byte(s)
for i: = 0; i < len(bs); i++ {
bs[i] = byte(strings.IndexByte(key, bs[i]) + 32)
}
return string(bs)
}

func main() {
s: = "The quick brown fox jumps over the lazy dog, who barks VERY loudly!"
enc: = encode(s)
fmt.Println("Encoded: ", enc)
fmt.Println("Decoded: ", decode(enc))
}</lang>

Output:

encoded: 2bu]E,KHm].Tdc|]4d\]),8M>]dQuT]<bu]U31C]Idf_]cbd].3Tm>]+ZzL]Ud,IUCk 
decoded: The quick brown fox jumps over the lazy dog, who barks VERY loudly!