String.replace with anonymous function with multiple matches

Questions & Help Questions
2

I’m not sure I fully understand what you want to do, but this example might give you a sense:

def replace_characters(string) do
    to_replace = ["&", "<", ">", "/", "'"]

    String.replace(string, to_replace, fn
      "&" -> "H"
      "<" -> "E"
      ">" -> "L"
      "/" -> "L"
      "'" -> "O"
    end)
  end

iex::1> Module.replace_characters("fdsfd &<>/' dsfds")                              
"fdsfd HELLO dsfds"

Anonimous function is arity 1, that’s why it complains.