How To Change A Rule

*To*: mathgroup at smc.vnet.net*Subject*: [mg32339] How To Change A Rule*From*: Ariel Fligler <ariel.fligler at cellpay.biz>*Date*: Wed, 16 Jan 2002 03:29:45 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Greetings, I'm quite newby to Mathematica programming and will thank you if you could help me solve the following: I have a list of rules of the form: {s1->-11, s2->12} And would like to change every rule in the list that it's right hand side is negative to 0 so that I will get: {s1->0, s2->12} I tried to find an access function to manipulate rules but could not. Any help will be greatly appreciated. TIA, Ariel.