<@U0BFDUP0E> this is java way and it works `return...

# announcements

[tianhao]

@jw this is java way and it works return list.stream().allMatch(new HashSet<>()::add);

[ilya.gorbunov]

And the equivalent in Kotlin would be:

listOf(1,2,3,1,2,3).all(HashSet<Int>()::add)

[tianhao]

@ilya.gorbunov unfortunately, this code can’t get compiled

[ilya.gorbunov]

Do you use Kotlin 1.1.x?

[ilya.gorbunov]

You can try it with this example: https://try.kotlinlang.org/#/UserProjects/nek63foc0grait5c7ca5ahfgd7/10rg453em7n1pfmh073iijhoi3

[tianhao]

ah, yeah, sorry it works as initially i used {} instead of ()

[tianhao]

Thanks

[tianhao]

But curiosity, why the following code behaves different, listOf(1,2,3,1,2,3).all { HashSet<Int>().add(it) }

[tianhao]

Ok, got it, stupid conversion tool, it’s a bug of that