Toggle Hidden Files Mac OS X

Hi all,

I have been using Ubuntu for 2 years now, and a few days ago I bought a Macbook. This is my first time using a Mac, so I have spent the better of two days learning the user interface, and configuring my Macbook. One thing I noticed is that there is no easy way to turn on and off hidden files, so I wrote a shell script to make it easy.

This is my first time ever making a script (I have previously never written a script on any OS), I hope you guys can comment on it, tell me whats good, bad, and how it can be done differently.

Specifically:

-Why does my terminal not close after the script is complete?

-Whats the best way to restart an application, ie one example has killall, the other uses osascript and envokes the quit command?

-Which application is safer?

-I named these files .command files so they can execute on double click, is the the best way to do it?

-Why do I have to execute 'open -a Finder' twice?

Example 1
#!/bin/sh
# This Application Makes Hidden Files Visible
# Note: The Application Will Close All Finder Windows
echo Warning This Application Will Close All Finder Windows!
echo Type y/n to Continue?
read answer
if [ "$answer" = "y" ]
then
    filesVisible=$(defaults read com.apple.finder AppleShowAllFiles)
    if [ "$filesVisible" = "0" ]
    then
        defaults write com.apple.finder AppleShowAllFiles -bool true
        killall Finder
    else
        defaults write com.apple.finder AppleShowAllFiles -bool false
        killall Finder
    fi
else
    exit
fi
exit

Example 2
#!/bin/sh
# This Application Makes Hidden Files Visible
# Note: The Application Will Close All Finder Windows
echo Warning This Application Will Close All Finder Windows!
echo Type y/n to Continue?
read answer
if [ "$answer" = "y" ]
then
    filesVisible=$(defaults read com.apple.finder AppleShowAllFiles)
    if [ "$filesVisible" = "0" ]
    then
        defaults write com.apple.finder AppleShowAllFiles -bool true
        osascript -e 'tell app "Finder" to quit'
        open -a Finder
        open -a Finder    
    else
        defaults write com.apple.finder AppleShowAllFiles -bool false
        osascript -e 'tell app "Finder" to quit'
        open -a Finder
        open -a Finder
    fi
else
    exit
fi
exit

                                                            Thanks,
                                                                 Omniwheel