SurveyCTO's addition: Created "once(...)" formula that takes an expression as a single argument. It returns the result of expression the first time only it gets evaluated. The other times it returns the previous result.
SurveyCTO's addition: Created "once(...)" formula that takes an expression as a single argument. It returns the result of expression the first time only it gets evaluated. The other times it returns the previous result.

--HG--
branch : surveycto2

medic/javarosa,medic/javarosa,medic/javarosa