1. find . -name '*.as' | xargs touch
   

2. find ~/Library/Application*Support/Macromedia/Flash*MX*2004/en/Conf*/Classes \
       -name '*.aso' | perl -lpe 'unlink $_'
   

if  (timestamp(object file) == timestamp(source file))
    reuse object file
else
    recompile source file
    set timestamp(object file) = timestamp(source file)

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