The result of `assoc` on a vector is well-defined, by treating the vector as a map with integer indices as keys.
But the result of `dissoc` on a vector is not so clear. `dissoc` removes a key from an associative thing. But you can't remove an index from the middle of a vector. Even if you could efficiently remove a single value, the index still exists, with a different value. In short, the definition of `dissoc` makes it impossible on a vector. Some other data structures, such as finger trees [1], support efficient insertion and removal from the middle, but it's still not a `dissoc` operation. Sequences in general support neither `assoc` nor `dissoc`. [1] https://github.com/clojure/data.finger-tree -- 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
