2010/12/8 Surgo <morgon.kan...@gmail.com> > To help myself learn Clojure, I figured I would write a pattern > matching / destructing macro to better look like languages I'm more > familiar with; i.e., destructuring by [first|second|rest] instead of > [first second & rest]. To do this I'm turning the aforementioned > vector into a string (via str) and looking for / replacing the | > character. However, this led to the following issue... > > (def test "abc") > (first test) > > \a > (rest test) > > (\b \c) > (string? (rest test)) > > false > > It would be really helpful if first/rest returned strings (or a > character in the case of first), not lists, when given string input. > Is there a design reason for the current behaviour and, if so, are > there equivalent built-in functions that do the right thing for > strings? >
(first "abc") gives you a character. (rest anything) returns a seq, by definition. It's not about Strings, it's the contract of rest. A String is not a seq, but it's viewable as a seq, in which case each element of the seq will be a character of the String. Note that this is not particular to String, but to almost any clojure datastructure : (rest [1 2 3]) doesn't return a vector either, but a seq: (2 3) etc. You seem to want to not use seq abstractions, but String manipulation abstractions, here. > > -- > 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<clojure%2bunsubscr...@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 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
