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by wybiral
3149 days ago
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> That's not really true. If you want an SQL database to back your website, then you'll deal with interface{} with Go's sql package. True. But for most real world scenarios I only ever use interfaces at the boundaries between APIs and they quickly get asserted into a type after being passed. Conceptually they're a bit like passing marshalled data between APIs in that sense. |
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That's IMHO a great way to think about when it's Good™ to use them. Yes, there are times when you just have to use the empty interface type but it's really not as bad as everyone makes it out to be.
I love Go because it is explicit and because explicit types make everything easier in the long run. I get tired of seeing Go written like Python/Ruby/$otherDynamicLang with overuse of interface{} and/or reflect.