Data commit

Task/Vigen-re-cipher/Jsish/vigen-re-cipher.jsish

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+/* Vigenère cipher, in Jsish */
+"use strict";
+
+function ordA(a:string):number {
+    return a.charCodeAt(0) - 65;
+}
+
+// vigenere
+function vigenereCipher(text:string, key:string, decode:boolean=false):string {
+    var i = 0, b;
+    key = key.toUpperCase().replace(/[^A-Z]/g, '');
+    return text.toUpperCase().replace(/[^A-Z]/g, '').replace(/[A-Z]/g,
+        function(a:string, idx:number, str:string) {
+            b = key[i++ % key.length];
+            return String.fromCharCode(((ordA(a) + (decode ? 26 - ordA(b) : ordA(b))) % 26 + 65));
+        });
+}
+
+provide('vigenereCipher', 1);
+
+if (Interp.conf('unitTest')) {
+    var text = "The quick brown fox Jumped over the lazy Dog the lazy dog lazy dog dog";
+    var key = 'jsish';
+    var enc = vigenereCipher(text, key);
+;    text;
+;    enc;
+;    vigenereCipher(enc, key, true);
+}
+
+/*
+=!EXPECTSTART!=
+text ==> The quick brown fox Jumped over the lazy Dog the lazy dog lazy dog dog
+enc ==> CZMIBRUSTYXOVXVGBCEWNVWNLALPWSJRGVVPLPWSJRGVVPDIRFMGOVVP
+vigenere(enc, key, true) ==> THEQUICKBROWNFOXJUMPEDOVERTHELAZYDOGTHELAZYDOGLAZYDOGDOG
+=!EXPECTEND!=
+*/