Clean up the oopsie. Rebuild the blank exercises.

caesar/caesar.js

@@ -1,26 +1,5 @@
-const caesar = function(string, shift) {
-  return string
-    .split("")
-    .map(char => shiftChar(char, shift))
-    .join("");
-};
+const caesar = function() {
 
-const codeSet = code => (code < 97 ? 65 : 97);
-
-// this function is just a fancy way of doing % so that it works with negative numbers
-// see this link for details:
-// https://stackoverflow.com/questions/4467539/javascript-modulo-gives-a-negative-result-for-negative-numbers
-const mod = (n, m) => (n % m + m) % m;
-
-const shiftChar = (char, shift) => {
-  const code = char.charCodeAt();
-
-  if ((code >= 65 && code <= 90) || (code >= 97 && code <= 122)) {
-    return String.fromCharCode(
-      mod(code + shift - codeSet(code), 26) + codeSet(code)
-    );
-  }
-  return char;
 };
 
 module.exports = caesar;