On Jul 2, 2009, at 11:48 AM, BerlinBrown wrote:
> > I posted a thread about side-effects. Some one replied that your > clojure functions should return a value. This is good advice, but I > have code that sometimes return nil. Is it better to return 'nil' or > an object with no data. I guess a simple example, if you have a > function that returns a string. Should you return a valid string or a > zero length string for all of your functions. I don't really understand your example. A zero length string is a valid string. Could you elaborate? If your function is called simply for its side effect, the return value isn't very important. But if it's guaranteed to work and takes a single parameter I usually just return the argument. That way you can stack your function calls. In general it's a good idea to separate the logic from the side effects. It makes testing easier and pure functions are more composable and reusable. — Daniel Lyons --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
