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kotlinlang

Screenshot from 2019-04-09 10-07-45.png

&gt; `plus` Returns a list containing all elements of the original collection and then all elements of the given elements sequence.

&gt; `plusElement` Returns a list containing all elements of the original collection and then the given element.

Yes... I understand how it happend. But it was postfactum, after type inference gave me `List&lt;Any&gt;` instead of `List&lt;List&lt;Int&gt;&gt;`. And I'd prefer to know exactly what's happening when I type it :simple_smile: . I'm wondering if better names could have been used.

Screenshot from 2019-04-09 10-21-23.png

Check this. IDEA is clearly showing the same result type for both methods.

Could be a bug in IDE, right? I mean, the type is statically checkable here and it's not `List&lt;List&lt;Int&gt;&gt;` as it's shown.

It seems so. It works correctly when you extract variable and use intention action to set explicit type.