Hi all,
I work with a database and need a function, that will convert Clojure
sequence to a string with a comma-separated elements. E.g.,
(comma-separated (list 1 2 3 4 5)) ==> "1, 2, 3, 4, 5"
It must work with any data type - ints, strings, other lists, etc.
E.g. for a list of strings it must generate
(comma-separated (list "1" "2" "3" "4" "5")) ==> "\"1\", \"2\",
\"3\", \"4\", \"5\""
I tried `cl-format` function from clojure.contrib.pprint package:
(cl-format nil "~{~S~^, ~}" lst)
It works fine, but is too slow. Next, I tried such function:
(defn comma-separated [s]
(if (= (type (first s)) String)
(chop (chop (chop (str "\" (apply str (interleave s
(repeatedly (fn [] "\", \"")))))))
(chop (chop (apply str (interleave s (repeatedly (fn [] ",
")))))))))
This one works much faster (~20 times), but it is ugly and still
doesn't cover all cases.
So, what is the fastest way to generate such list?
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