Also, I'm assuming distinct uses .equals semantics which might be worth calling out in the doc
On Wed, Dec 28, 2016, 11:22 AM Mike Rodriguez <mjr4...@gmail.com> wrote: > The doc for `distinct` is: > "Returns a lazy sequence of the elements of coll with duplicates removed. > Returns a stateful transducer when no collection is provided." > > (1) In the lazy sequence case, I've thought that maybe it is assuemd there > is a guarantee that the order of the input seq is preserved. However, this > isn't stated. Is this an assumption to rely on for `distinct` and, more > generally, the Clojure seq-based API functions? > > (2) In either case, when there are duplicates, there do not seem to be any > guarantees on which one of the duplicates will be preserved. Should this > be stated? I'm thinking that maybe this is about Clojure's design > philosophy being that equal values to not ever need to be distinguished > between, so the API doesn't explicitly support this concern. However, > there are times when identity relationships can matter - performance would > be one that comes to mind. > - This has some relationship to the Scala question @ > http://stackoverflow.com/questions/6735568/scala-seqlike-distinct-preserves-order > > There have been a few occasions where I relied on (or wanted to rely on) > (1). I haven't had many cases where (2) matters, but I could see it coming > up on perhaps rare occasions. > > -- > 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 > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
