elixir - How do I map any given function over a list of values? -

i splitting string on character , trim items in resulting split. expect following work string.trim/1 exists:

iex> "my delimited ! string of doom" |> string.split("!") |> enum.map(string.trim) ** (undefinedfunctionerror) function string.trim/0 undefined or private. did mean 1 of:    * trim/1   * trim/2  (elixir) string.trim() 

i receive undefinedfunctionerror indicating function string.trim/0 not exist. want accomplished anonymous function passed enum.map:

iex> "my delimited ! string of doom" |> string.split("!") |> enum.map(fn (word) -> string.trim(word) end) ["my delimited", "string of doom"] 

does enum.map/2 require anonymous function second parameter? possible give desired function parameter?

you need use & operator. capture operator

try this:

iex()> "my delimited ! string of doom" |> string.split("!") |> enum.map(&string.trim/1) ["my delimited", "string of doom"]