I like to build more complex sequences within the sequence monad, like this:
(concat (when cond1 [start elements]) main-seq (when cond2 [end elements])) This also composes nicely with function calls. Another option for a subset of cases: (cond-> start-vec condition1 (conj end-element1) condition2 (conj end-element2)) kind regards 2014-05-21 18:23 GMT+02:00 Colin Yates <colin.ya...@gmail.com>: > I often find myself doing the following: > > (let [some-seq [] > some_seq (if some-condition? (conj some-seq some-element) some-seq) > some_seq (if some-other-condition? (conj some-seq > some-other-element) some-seq) > some_seq etc.]) > > In other words building up a sequence which contains the results of > predicated elements. Building up a where clause in SQL for example. > > I experimented with the -> and ->> but that didn't help and just looked > messier. > > How do you handle this pretty common use case? > > 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. > -- 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.
