feat: implement findPermutationDifference function in TypeScript and remove debug print statement in Java

Author: Dlafferty251

lesson_13/maps_java/maps_app/src/main/java/com/codedifferently/lesson13/Lesson13.java

@@ -29,7 +29,6 @@ public int findPermutationDifference(String s, String t) {
     }
     // Runs a for loop that will be the length of t but this time we will be using the map t
     // tell our loop to run until it finds the same character
-    System.out.println(charByIndex);
     return difference;
   }
 }

lesson_13/maps_ts/src/lesson13.ts

@@ -3,5 +3,19 @@
  * https://leetcode.com/problems/permutation-difference-between-two-strings
  */
 export function findPermutationDifference(s: string, t: string): number {
-  return 0;
+  const charByIndex = new Map<String, number>();
+
+  for(let i = 0; i < s.length; ++i) {
+    charByIndex.set(s[i], i);
+  }
+
+  let difference = 0;
+
+  for (let j = 0; j < t.length; ++j) {
+    if(charByIndex.has(t[j])) {
+      //as number is telling the computer to expect a number
+      difference += Math.abs((charByIndex.get(t[j]) as number) - j); 
+    }
+  } 
+  return difference;
 }