Simplify p22

inputs/passing/projEuler/p22.ts

@@ -15,44 +15,10 @@ function nameListScore(names: string[]) {
 }
 
 function nameScore(name: string) {
-  // Obviously we should be using something like charCodeAt instead of this
-  // workaround. Unfortunately that's not implemented yet (TODO). There's also
-  // the issue that letterMap is currently rebuilt from scratch on every call
-  // to nameScore, which also needs to be fixed (TODO).
-
-  const letterMap = {
-    A: 1,
-    B: 2,
-    C: 3,
-    D: 4,
-    E: 5,
-    F: 6,
-    G: 7,
-    H: 8,
-    I: 9,
-    J: 10,
-    K: 11,
-    L: 12,
-    M: 13,
-    N: 14,
-    O: 15,
-    P: 16,
-    Q: 17,
-    R: 18,
-    S: 19,
-    T: 20,
-    U: 21,
-    V: 22,
-    W: 23,
-    X: 24,
-    Y: 25,
-    Z: 26,
-  };
-
   let sum = 0;
 
-  for (let i = 0; i < name.length; i++) {
-    sum += letterMap[name[i] as keyof typeof letterMap];
+  for (const c of name) {
+    sum += c.charCodeAt(0) - "A".charCodeAt(0) + 1;
   }
 
   return sum;