check ebook store for programmers

https://store.raywenderlich.com/ | Store | Ray Wenderlich
https://www.objc.io/books/ | Books · objc.io
https://gumroad.com/library | Gumroad - Library
https://tatsu-zine.com/books/ | 書籍一覧 - 達人出版会
https://peaks.cc/ | PEAKS（ピークス）｜それ知りたい！が本になる、技術書クラウドファンディング
https://booth.pm/ja | BOOTH - 創作活動がより楽しくなるショップ作成サービス

convenience json tools for Swift

Postman

Postman | API Development Environment
To test http API service.

1. convert curl format request to Swift
2. import curl request from Web Service API Reference.

quicktype

Easily read and write JSON in any programming langauge • quicktype
convert JSON text to Swift Codable object

let decoder = try? JSONDecoder().decode(Welcome.self, from: unwrappedData)
let greeting = decoder?.greeting

Code Beautify

Best Online JSON Viewer, Beautifier, Formatter, Analyser, Minify, Converter
JSON formatter