Data update

Task/Substitution-cipher/Rust/substitution-cipher.rs

@@ -0,0 +1,25 @@
+fn main() {
+    let key = "]kYV}(!7P$n5_0i R:?jOWtF/=-pe'AD&@r6%ZXs\"v*N[#wSl9zq2^+g;LoB`aGh{3.HIu4fbK)mU8|dMET><,Qc\\C1yxJ";
+
+    let s = "The quick brown fox jumps over the lazy dog, who barks VERY loudly!";
+    let enc = encode(s, key);
+    println!("Encoded: {}", enc);
+    println!("Decoded: {}", decode(&enc, key));
+}
+
+fn encode(s: &str, key: &str) -> String {
+    let key_bytes = key.as_bytes();
+    s.bytes()
+        .map(|b| key_bytes[(b as usize) - 32] as char)
+        .collect()
+}
+
+fn decode(s: &str, key: &str) -> String {
+    let key_bytes = key.as_bytes();
+    s.bytes()
+        .map(|b| {
+            let index = key_bytes.iter().position(|&k| k == b).unwrap();
+            (index + 32) as u8 as char
+        })
+        .collect()
+}