[HAI] GPT optimisation

https://leetcode.com/problems/string-compression/submissions/1451041094/

lib/compress/compress.ts

@@ -1,36 +1,64 @@
-export function compress(chars: string[]) {
+export function compress(chars: string[]): number {
   let L = 0;
   let R = 1;
+  let count = 1;
   const N = chars.length;
-  let currentCounter = 1;
-
-  while (L <= N && R <= N) {
-    const curL = chars[L];
-    const curR = chars[R];
-
-    if (curL !== curR || curR === undefined) {
-      if (currentCounter > 1) {
-        [...("" + currentCounter)].forEach((item, i) => {
-          chars[L + 1 + i] = item;
-        });
-        currentCounter = 1;
+
+  while (R <= N) {
+    if (chars[R] !== chars[L]) {
+      if (count > 1) {
+        const countStr = count.toString();
+        for (let i = 0; i < countStr.length; i++) {
+          chars[++L] = countStr[i];
         }
-      L = R;
       }
-
-    if (curL === curR) {
-      currentCounter++;
-      chars[R] = " ";
+      L++;
+      if (R < N) chars[L] = chars[R];
+      count = 1;
+    } else {
+      count++;
     }
-
     R++;
   }
 
-  for (let i = chars.length - 1; i >= 0; i--) {
-    if (chars[i] === " ") {
-      chars.splice(i, 1);
-    }
-  }
+  chars.length = L;
 
   return chars.length;
 }
+
+// export function compress(chars: string[]) {
+//   let L = 0;
+//   let R = 1;
+//   const N = chars.length;
+//   let currentCounter = 1;
+
+//   while (L <= N && R <= N) {
+//     const curL = chars[L];
+//     const curR = chars[R];
+
+//     if (curL !== curR || curR === undefined) {
+//       if (currentCounter > 1) {
+//         [...("" + currentCounter)].forEach((item, i) => {
+//           chars[L + 1 + i] = item;
+//         });
+//         currentCounter = 1;
+//       }
+//       L = R;
+//     }
+
+//     if (curL === curR) {
+//       currentCounter++;
+//       chars[R] = " ";
+//     }
+
+//     R++;
+//   }
+
+//   for (let i = chars.length - 1; i >= 0; i--) {
+//     if (chars[i] === " ") {
+//       chars.splice(i, 1);
+//     }
+//   }
+
+//   return chars.length;
+// }