Inject values from a list into a template. Useful for i18n and templated copy.

String.Interpolate exports two functions interpolate : String -> List String -> String and interpolateWithDict : String -> Dict String String -> String. The array based input string should use the format "first arg: {0}, second arg: {1}" and so on. The dict based input string should use the format "first arg: {first_arg}, second arg: {second arg}", spaces and alphanumeric characters as well as underscores.

Example:

import String.Interpolate exposing(interpolate, interpolateWithDict)

output : String
output =
  interpolate "My name is {0} {1}" ["Luke", "Westby"] --"My name is Luke Westby"


dictOutput : String
dictOutput =
    let
        dict =
            Dict.empty
                |> Dict.insert "firstName" "Luke"
                |> Dict.insert "lastName" "Westby"
    in
        interpolateWithDict "My name is {firstName} {lastName}" dict --"My name is Luke Westby"