CODEWITHSUNDEEP
ocaml
user3276096
user3276096

Reputation: 11

Ocaml list.map error this function is applied to too many arguments

Hello I am new to Ocaml and I am trying to play around with List and list.map. So I write a function helper which takes a list and creates a list of lists.

let rec helper l= 
  match l with 
  | []->[[]]
  | x::xs -> [x]::helper xs;;

Now when i try to use list.map to concatenate to each member of this list of list i get an error.

List.map(fun y->[1]@y) helper [1;2;3];;

Error: This function is applied to too many arguments; maybe you forgot a;'`

I am unable to understand why is this error causes. Any help would be appreciated.

Thank you

Upvotes: 1

Views: 734

Answers (1)

Jackson Tale
Jackson Tale

Reputation: 25812

You need () for helper [1;2;3]

i.e., List.map(fun y->[1]@y) (helper [1;2;3]).

This will remove the error.

Upvotes: 1

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