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Function changes in a program

• To: mathgroup at smc.vnet.net
• Subject: [mg92262] Function changes in a program
• From: "Chris Degnen" <tilting at windmills.freeserve.co.uk>
• Date: Thu, 25 Sep 2008 05:30:55 -0400 (EDT)

Hi

Does anyone have a suggestion on how to
check for changes in environment function
variables in a program. I.e. starting with ...

initial environment

f[a]=1
f[b]=2


later environment

f[a]=1
f[b]=99
f[m]=3

I'd like to be able to determine that
f[b] had changed and f[m] was added.