История изменений

local
    val foldl = List.foldl
    val compare = String.compare
    val rec sort = fn (x::xs, y) =>
        val (a, b) = x
        val (a1, b1) = y
        case compare(a, a1) of
          LESS => x::(sort(y, xs))
        | EQUAL => x::y::xs
        | GREATER => y::x::xs
in
    val sorted = fn x::xs =>
        foldl(sort, [x], xs)
end

local
    val foldl = List.foldl
    val compare = String.compare
    val rec sort = fn (x::xs, y) =>
        val (a, b) = x
        val y = (a1, b1)
        case compare(a, a1) of
          LESS => x::(sort(y, xs))
        | EQUAL => x::y::xs
        | GREATER => y::x::xs
in
    val sorted = fn x::xs =>
        foldl(sort, [x], xs)
end