Also, you don't want to simply split the CSV into lines by looking for newlines. CSVs can contain newlines quoted in fields, so you need to actually parse the CSV with quoting to figure out the line breaks for the file format and ignore the line breaks in the fields.
- David On Fri, Jun 17, 2011 at 9:21 AM, Mark Rathwell <mark.rathw...@gmail.com> wrote: > > Some resources, in case they help: > 1. http://clojuredocs.org/ has documentation for core and contrib, and often > has examples > 2. http://clojure.org has a lot of reading material about the language, > including a nice cheat sheet (http://clojure.org/cheatsheet) > 3. http://www.clojureatlas.com offers a unique way to navigate between the > pieces of the clojure language > 4. if you are at a REPL, you can use the doc macro to read function doc > strings: > user> (doc map) > ------------------------- > clojure.core/map > ([f coll] [f c1 c2] [f c1 c2 c3] [f c1 c2 c3 & colls]) > Returns a lazy sequence consisting of the result of applying f to the > set of first items of each coll, followed by applying f to the set > of second items in each coll, until any one of the colls is > exhausted. Any remaining items in other colls are ignored. Function > f should accept number-of-colls arguments. > nil > > > On Fri, Jun 17, 2011 at 9:13 AM, octopusgrabbus <octopusgrab...@gmail.com> > wrote: >> >> Many thanks. I didn't recognize the % symbol is used similarly to the >> way it's used in printf and constructing SQL query string. >> >> On Jun 17, 9:07 am, Ken Wesson <kwess...@gmail.com> wrote: >> > On Fri, Jun 17, 2011 at 8:57 AM, octopusgrabbus >> > >> > <octopusgrab...@gmail.com> wrote: >> > > I'm trying this in REPL >> > >> > > timmy=> (def ox [1 2 3 4]) >> > > #'timmy/ox >> > > timmy=> ox >> > > [1 2 3 4] >> > > timmy=> (map #(reduce str/split (seq ox) #",")) >> > > java.lang.IllegalArgumentException: Wrong number of args (1) passed >> > > to: core$map (NO_SOURCE_FILE:0) >> > > t >> > >> > Yikes. >> > >> > Well, first of all, you need to >> > >> > (map #(str/split % #",") some-seq-of-strings) >> > >> > -- map takes a function and then one or more sequences or collections >> > to iterate over. Further, the function needs to have an argument; with >> > #() closures you use % to stand in for the element from the sequence. >> > So >> > >> > (map #(* 2 %) ox) >> > >> > in your case would return >> > >> > (2 4 6 8) >> > >> > as a lazy sequence. >> > >> > Lastly, though, ox doesn't contain strings so str/split can't be used >> > on them. And I don't know why you had a "reduce" in there. >> > >> > -- >> > Protege: What is this seething mass of parentheses?! >> > Master: Your father's Lisp REPL. This is the language of a true >> > hacker. Not as clumsy or random as C++; a language for a more >> > civilized age. >> >> -- >> 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 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 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
