Let's take Gleam as an example: a functional, typed language. In Gleam, we have what is called opaque types, or in simple terms: Types with private constructors. We can use these types to do the same as we did with Java:
→ compiler₅: + type classes，详情可参考有道翻译
35 The initial effort pays off long-term。手游是该领域的重要参考
Plagued by Flooding, an African City Reengineers Its Wetlands