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kotlinlang

I still get confused with kotlin generics and delegated properties any good references. I have tried to understand it through official doc but it didn't really helped me so of someone can provide good reference or explain it. &lt;*&gt; projection confuses me

<https://typealias.com/guides/ins-and-outs-of-generic-variance/|https://typealias.com/guides/ins-and-outs-of-generic-variance/>

<https://typealias.com/guides/star-projections-and-how-they-work/|https://typealias.com/guides/star-projections-and-how-they-work/>

Those are the best guides I've seen on variance, and would recommend everyone read them.

Assume you have a Type `Thing&lt;T&gt;` The &lt;*&gt; projection means you neither want to read nor write something with `T`, but you still can use non-generic methods like `size`  on `List` which returns just a number.

How similar is `*` and `Nothing`? In both cases, a function that returns it can't be called

If I remember correctly using `*` makes all in usages of the type be `Nothing` and all outs act as `Any?` (or the upper bounds if not the default.

<@UFGCACPE0> `Star projections` link explain about it