Adds examples for String Decoder related utility functions;

Signed-off-by: Ashwin Hegde <ashwin.hegde3@gmail.com>

Author: hegdeashwin

Kit/Session-4/StringDecoder/stringDecoder.js

@@ -0,0 +1,24 @@
+/***
+ * The goal of this file is to know about the string decoder functions;
+ * A simple interface to buffer.toString() but provides additional support for utf8.
+ *
+ * How to run this example:
+ * 1. node stringDecoder.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var cent = new Buffer([0x40]);
+console.log(cent.toString());
+
+var StringDecoder = require('string_decoder').StringDecoder;
+var decoder = new StringDecoder('utf8');
+
+/***
+ * decoder.write returns a decoded string.
+ */
+cent = new Buffer([0xC2, 0xA2]);
+console.log(decoder.write(cent));
+
+var euro = new Buffer([0xE2, 0x82, 0xAC]);
+console.log(decoder.write(euro));
+