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# codingconventions

[marcinmoskala]

https://github.com/JetBrains/kotlin-web-site/blob/yole/styleguide/pages/docs/reference/coding-conventions.md#platform-types
What is wrong with unsafe casting there if we know that type cannot be null?

[yole]

not sure what you mean. do you prefer val foo = bar() as String to val foo: String = bar()? why?

[marcinmoskala]

When I don't want explicit type then I prefer val foo = bar()!!

[yole]

We won’t recommend using !! anywhere in the style guide 🙂