On Thursday, October 9, 2014 12:51:47 AM UTC-4, Ambrose Bonnaire-Sergeant wrote: > > On Wed, Oct 8, 2014 at 10:55 PM, John Gabriele <jmg...@gmail.com > <javascript:>> wrote: > >> * (when calling `seq` on a coll) "...In either case, if the collection >> is empty, `seq` returns nil and never an empty sequence. Functions that >> promise to return seqs (not sequences), such as `next`, work the same way." >> >> > I think that's a typo. I don't know what the difference between a "seq" > and a "sequence" would be in this context. > > > Thanks, Ambrose.
-- John > > >> >> >> On Wednesday, October 8, 2014 8:16:38 PM UTC-4, James Reeves wrote: >>> >>> The words "seq" and "sequence" can be used interchangeably. >>> >>> The "map" and "filter" functions return seqs. >>> >>> Yes, a seq may be lazy, but vectors and lists cannot. >>> >>> "seqable" means any data structure that can be turned into a seq using >>> the "seq" function. This includes the Clojure collections, but also >>> strings, arrays and Java collections. >>> >>> The Sequential interface is a way of indicating a collection has a >>> natural order. So seqs, lists and vectors are sequential, but maps and sets >>> are not. >>> >>> The ISeq interface is the internal interface for seqs. An object is a >>> seq if it implements ISeq. >>> >>> - James >>> >>> >>> On 8 October 2014 19:39, John Gabriele <jmg...@gmail.com> wrote: >>> >>>> Reading Joy of Clojure, section 5.1.2, I'm hoping someone here can help >>>> me understand the following: >>>> >>>> * `clojure.core/seq` returns a "seq" or a "sequence"? Likewise for >>>> `map` and `filter`. >>>> >>>> * What is the difference between a "seq" and a "sequence"? >>>> >>>> * A seq may possibly be lazy, but vectors and lists are always >>>> fully-realized, correct? >>>> >>>> * What does "seqable" mean? >>>> >>>> * Is Seq (ISeq?) or is Sequential the `first`/`rest` API? What is the >>>> difference between ISeq and Sequential (see `seq?` & `sequential?`)? >>>> >>>> Thanks! >>>> >>>> -- 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.
