On Monday, July 16, 2018 at 4:08:47 PM UTC-5, solussd wrote: > > Another way to think about it is lists and vectors are different and the > idiomatic way to add items to them is different. >
I would say different data structures have different ways to *efficiently* add items to them, and conj is an operation to add items efficiently (meaning, sub-linear time). So when you see conj, you know it is always a "fast" operation. > A (singly-linked) list is usually prepended to (otherwise you have to walk > the entire list to find the end). A vector is usually added to at it’s n+1 > index, where n is the size of the vector. The conj function is polymorphic. > > cons takes a seq and returns a seq. It only cares that it can get a seq on > whatever collection you give it and will always prepend to that seq. > Slight modification - I would say cons takes a *seqable* and returns a seq. For example, a vector is seqable, but not a seq. -- 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.
