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Alex Rivera
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I'm new at OCaml (and still a novice in learning programming in general) and I have a quick question about checking what kind of string the next element in the string list is. I want it to put a separator between each element of the string (except for the last one), but I can't figure out how to make the program 'know' that the last element is the last element. Here is my code as it is now: let rec join (separator: string) (l : string list) : string = begin match l with | []->"" | head::head2::list-> if head2=[] then head^(join separator list) else head^separator^(join separator list) end let test () : bool = (join "," ["a";"b";"c"]) = "a,b,c" ;; run_test "test_join1" test Thanks in advance!
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