My many thanks, Matt. I'd never considered just catching the error. Crude, yet also clever and effective.
Yes, I had defined instrument_no as a float, and no math operations were ever intended for it. Thanks for helping me push on! Tim On May 21, 9:20 pm, Matt Jones <[email protected]> wrote: > On May 21, 2010, at 8:27 PM, tjg wrote: > > > Hi Kevin, > > > Nope, can't check for nil on the attribute since that calls the > > attribute accessor causing recursion and an eventual segmentation > > fault. > > There's always > > def instrument_no > "%0.3f" % read_attribute(:instrument_no) rescue nil > end > > (or rescue '0.000' - your call) which will ensure that the % can't > cause problems. > > Out of curiosity, is :instrument_no an actual float value? The above > will cause problems if you try to do math with it (as it's returned as > a string). If it's not something you'd expect to do math on, but just > a "number with 3 digits after the decimal", I'd highly recommend you > look into using a decimal type. > > --Matt Jones > > -- > You received this message because you are subscribed to the Google Groups > "Hobo Users" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/hobousers?hl=en. -- You received this message because you are subscribed to the Google Groups "Hobo Users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hobousers?hl=en.
