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  • $\begingroup$ @rcollyer is there any way to set a default value for any missing option? That would make this more elegant. Nevertheless I think this is the best way to deal with nested rules; getting a value for e.g. a -> b -> c -> d is pretty hairy otherwise. $\endgroup$ Commented Mar 17, 2012 at 13:19
  • $\begingroup$ The only way I'm a aware of is via SetOptions which isn't exactly what you want. $\endgroup$ Commented Mar 17, 2012 at 17:02
  • $\begingroup$ @rcollyer how would you do it via SetOptions? $\endgroup$ Commented Mar 17, 2012 at 17:07
  • $\begingroup$ Exactly, the problem. SetOptions requires a symbol to be associated with the options. In this case, it isn't clear what symbol you'd use. $\endgroup$ Commented Mar 17, 2012 at 18:05
  • 2
    $\begingroup$ @Mr.Wizard your solution is great but it seems to me default values work only for non-nested values. I have tested this by creating another set where "badge_counts"->"gold" value is missing and I am getting an error message Option name badge_counts ->gold not found in defaults for \ {{display_name ->Stones ,accept_rate ->80,account_id \ ->495497,badge_counts ->{bronze ->39,silver ->9}},{age \ ->Missing[],badge_counts ->{bronze ->Missing[NotAvailable ],gold \ ->Missing[NotAvailable ],silver ->Missing[NotAvailable ]}}}. >> $\endgroup$ Commented Jul 18, 2015 at 8:36