Add week 5 soultions : encodeAndDecodeStrings

Author: yolophg

encode-and-decode-strings/yolophg.js

@@ -0,0 +1,14 @@
+// Time Complexity: O(n), O(n)
+// Space Complexity: O(n), O(n)
+
+class Solution {
+    encode(strs) {
+        // join the array into a single string using a delimiter, '|'.
+        return strs.join('|');
+    }
+
+    decode(str) {
+        // split the string using the delimiter '|' and return the array.
+        return str.split('|');
+    }
+}