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dm-adjust ============= DataMapper plugin providing methods to increment and decrement properties It provides the following function (for collections and resources): == adjust! Person.adjust!(:salary => 1000) # increases the salary of all people with 1000. Person.all(:age.gte => 40).adjust!(:salary => 2000) # increase salary of them oldies. @child.adjust!(:allowance => -100) # less money for candy and concerts