Create: 0535-encode-and-decode-tinyurl.ts

typescript/0535-encode-and-decode-tinyurl.ts

@@ -0,0 +1,29 @@
+const encodeMap = {};
+const decodeMap = {};
+let size = 0;
+
+/**
+ * Encodes a URL to a shortened URL.
+ */
+function encode(longUrl: string): string {
+ if (!encodeMap.hasOwnProperty(longUrl)) {
+ let shortUrl = size + 1;
+ size += 1;
+ encodeMap[longUrl] = shortUrl;
+ decodeMap[shortUrl] = longUrl;
+ }
+
+ return encodeMap[longUrl];
+}
+
+/**
+ * Decodes a shortened URL to its original URL.
+ */
+function decode(shortUrl: string): string {
+ return decodeMap[shortUrl];
+}
+
+/**
+ * Your functions will be called as such:
+ * decode(encode(strs));
+ */