If I call a function and use the .? operator, will...

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[Tsvetozar Bonev]

If I call a function and use the .? operator, will the function not be called when the .? fails?

[kirillrakhman]

which function do you mean? update or copy?

[kirillrakhman]

if childCatalogue is null, childCatalogue?.copy will not be called and will simply return null, but update will still be called

[Tsvetozar Bonev]

Thought so as well, thanks

[Tsvetozar Bonev]

What would be a cleaner way to only execute some code with an iterable if it is in the Iterable list

[Tsvetozar Bonev]

the any { } predicate doesn't seem to run itself only when there is an object in the itterable collection

[Tsvetozar Bonev]

I guess a forEach{} would do the same but is there something that would only work on the first element

[kirillrakhman]

what do you mean by "if it is in the Iterable list"?

[Tsvetozar Bonev]

I have this query that returns an iterable and I know that if it returns then it will either have no elements or just one element

[kirillrakhman]

you can do iterable.singleOrNull()?.let { /* put your code here */ }

[Tsvetozar Bonev]

but forEach implies that there are more than one elements which doesn't rub me the right way, although it would work as expected

[Tsvetozar Bonev]

I always forget that let{} predicate, thanks a lot 😄

[kirillrakhman]

you can always do the imperative way and write if (iterable.count() == 1) doStuff()

[Tsvetozar Bonev]

Yeah, I know, but that adds some clutter

[kirillrakhman]

true, in some situations let can be a bit more elegant