index.ts: Conceptual example

wrong language text in Ukrainian language version explaining Observer patternt in real-world analogy

wrong logic in java example of Facade pattern

"Фабрика відеокодеків кодеків" в описі паттерну Фасад на Java

Extract Superclass description

Replace Type Code with Class - error in code

Email after payment received has an incorrect link

About the singleton

an error

why no rust examples?