Lazy Initialization

本文讲述一个recursive block的实际使用案例，可以让大家通过例子看看为什么使用recursive block，以及如何用swift式的方式来实现。

Continuous Integration is the process of automatically building and running tests whenever a change is committed.

Frameworks are a collection of code and resources to encapsulate functionality that is valuable across projects. Frameworks work perfectly with extensions, sharing logic that can be used by both the main application, and the bundled extensions.

什么是 Github Swift API Framework