Appending to an array in a plist

Handy commandline to append an item to an array in a plist:

/usr/libexec/PlistBuddy -c "Add :SomeArray: string 'newstring'" /Library/Preferences/com.something.plist

If you want to operate on a specific item, you can specify a 0-based array offset, this deletes the first element in the array:

/usr/libexec/PlistBuddy -c "Delete :SomeArray:0 string" /Library/Preferences/com.something.plist