search for: chaters

...Man2, running in 2 machines. When Chater1 login, RailsApp call MiddleMan1 to get something about Chater1 from db to memory, like his contacts or other personal settings. When Chater2 login, RailsApp call MiddleMan2 do the same thing. But who is reponsible for the Global Data? like a Online Chaters List, or Active Chat Room List ? I think, for the MiddleMan1 & MiddleMan2 located in different machines, global data should not be there. So global data in RailsApp as Global Variables? But how about RailsApp also running in 2+ servers ? It seems the possible ways to store global dat...

I''m developing database systems for clinical trials using Ruby on Rails. Some trials require ''double data entry'' as a form of validation; I need to incorporate this into my system and am having difficulties. My plan would be to have it work as follows: - Once a new record has been created, alongside the usual ''edit'' option there would be a

Hello I need to check that the NHS numbers in my database are valid. I''m storing them as ten-digit strings: the first nine are the identifier and the tenth is a check digit. There are four steps to calculating the check digit (from http://www.connectingforhealth.nhs.uk/systemsandservices/nsts/docs/tech_nn_check_digit.pdf): 1. multiply each of the first nine digits by a weighting factor