Data update

Task/Substitution-cipher/JavaScript/substitution-cipher.js

@@ -0,0 +1,30 @@
+const key = "]kYV}(!7P$n5_0i R:?jOWtF/=-pe'AD&@r6%ZXs\"v*N[#wSl9zq2^+g;LoB`aGh{3.HIu4fbK)mU8|dMET><,Qc\\C1yxJ";
+
+function encode(s) {
+  let result = '';
+
+  for (let i = 0; i < s.length; i++) {
+    result += key[s.charCodeAt(i) - 32];
+  }
+
+  return result;
+}
+
+function decode(s) {
+  let result = '';
+
+  for (let i = 0; i < s.length; i++) {
+    result += String.fromCharCode(key.indexOf(s[i]) + 32);
+  }
+
+  return result;
+}
+
+function main() {
+  const s = "The quick brown fox jumps over the lazy dog, who barks VERY loudly!";
+  const enc = encode(s);
+  console.log("Encoded: ", enc);
+  console.log("Decoded: ", decode(enc));
+}
+
+main();