The character of Kotlin

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Bruce Tate " Seven languages in seven weeks " - and since then I adore her! Although, I have experience working with most of the languages described in the book, I really liked how the author characterizes languages, and how these characteristics ultimately affect the practical use of the language.
So I decided to write another chapter for this book, an additional one. It will be devoted to a language that I know well enough, I understand its advantages ...