How to open file in some applicationl with AppleScript

The one way is:

 set the_application to path to application "TextEdit"
 tell application "Finder"
  open the_file using the_application
 end tell

but the best seems to be:

set f to choose file of type "TEXT"
tell application "Finder"
 set a to application file id "com.apple.TextEdit"
 open f using a
end tell