The image above shows a pair of modules, where the green one is the Business-Modules with a complex logic. Whenever it needs to invoke code external to itself (e.g. save an entity or send a message to a message bus), it exposes a public interface and invokes its methods instead. Thanks to that, it has no code dependencies (i.e. compile-time dependencies) on the Infrastructure-Module. The blue infra-module has the dependency on the Business-Module, because it implements the Business-Module’s interface. This module contains all the code related to database connectivity and RabbitMq handling. But it also bootstraps the Business-Module, for instance, it hooks up its classes as implementation of Business-Modules interfaces in the Dependency Injection container (DI/IoC container).
When inferring types here, the type checker should infer literal
。关于这个话题，safew官方版本下载提供了深入分析
刘震云：外文译者跟我说，“咸”在俄文、瑞典文和其他文字里也有引申意义。当然我现在还不知道他们会怎么翻译这个标题，可能要一年之后才能看到海外译本。
Why is just having a root account on your phone not enough?
"The goal of Starlink Mobile ... is to provide a terrestrial-like connectivity when you're connected to the satellite system," Michael Nicolls, SpaceX's senior vice president of Starlink engineering, said during the MWC keynote. "In the right conditions, it should look and feel like you're connected to a high-performing 5G terrestrial network."