encode-and-decode-string solution

Author: krokerdile

encode-and-decode-strings/krokerdile.js

@@ -0,0 +1,35 @@
+class Solution {
+    /**
+     * @param {string[]} strs
+     * @returns {string}
+     */
+    encode(strs) {
+        let result = "";
+
+        for (const str of strs) {
+            result += `${str.length}#${str}`;
+        }
+
+        return result;
+    }
+
+    /**
+     * @param {string} str
+     * @returns {string[]}
+     */
+    decode(s) {
+        let result = [];
+        let i = 0;
+        // 5#hello5#world
+        while (i < s.length) {
+            const pos = s.indexOf("#", i);
+            const len = parseInt(s.slice(i, pos));// 5
+            i = pos + 1;
+            const str = s.slice(i, i + len);
+            result.push(str);
+            i += len;
+        }
+        return result;
+    }
+}
+