HomeHacker News Show HN: UML model and code examples of GoF patterns in Crystal https://ift.tt/3taBsGP byHat hair -April 11, 2021 0 Show HN: UML model and code examples of GoF patterns in Crystal https://ift.tt/2QcHs3x April 11, 2021 at 10:40AM Tags: Hacker News Facebook Twitter