Formatter

#todo：整理 WWDC 2020 影片中的範例

🍎 官方

• Formatters: Make data human-friendly - WWDC 2020 ⭐

📘 參考

• getting the difference between two dates - Hacking with Swift Forum

• Days Calculator: Days Between Two Dates - TimeAndDate.com

• Understanding Date and DateComponents - Sarun

• Getting the number of days between two dates in Swift - Sarun

• Formatting numbers in Swift - Sundell (#todo)