improve hexToString

Author: wseymour15

lib/m2ts/caption-stream.js

@@ -690,12 +690,9 @@ Cea708Stream.prototype.handleText = function(i, service, options) {
 
   // Converts an array of bytes to a unicode hex string.
   function toHexString(byteArray) {
-    const newArr = [];
-    byteArray.forEach((byte) => {
-      newArr.push(('0' + (byte & 0xFF).toString(16)).slice(-2));
-    });
-
-    return newArr.join('');
+    return byteArray.map((byte) => {
+      return ('0' + (byte & 0xFF).toString(16)).slice(-2);
+    }).join('');
   };
 
   if (isMultiByte) {