pub fn end(state: #(List(String), String, Int)) -> String
pub fn f( state: #(List(String), String, Int), val: a, ) -> #(List(String), String, Int)
pub fn format(fmtstr: String) -> #(List(a), String, Int)
Inserts strings, ints or floats into placeholders similar to str.format() in Python
format("hello {}, pi equals {}!") |> f("World") |> f(3.14) |> end() // -> "hello World, pi equals 3.14!"