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kotlinlang

Hello, everyone. I’m just started using Kotlin and I’m confused a little bit. Kotlin devs told that `!!.` and `?.` are a good way to make NPE safety apps.
I’m just wrote few lines of code but there is a huge number of such specific construction.
Can anyone review my small code and give quick feedback… Because I’m feeling that I’m do something wrong…
<https://gist.github.com/4b29518ea786653500ea0d6a8edd46f4>

Thanks.