If you have a Google account, you can save this code to your Google Drive.
Google will ask you to confirm Google Drive access.
Save file as:
If you have saved a file to Google Drive, you can open it here:
Click the button to add elements to the beginning of the array.
Note: The unshift() method does not work properly in Internet Explorer 8 and earlier: the values will be inserted, but the return value will be undefined.