Bug in Collections/Compound tasks?

[ttoomm318]

There seems to be a bug with the test(s) for
fun Shop.getNumberOfTimesProductWasOrdered(product: Product): Int

I've tried the the following two solutions:

Provided solution:

fun Shop.getNumberOfTimesProductWasOrdered(product: Product): Int {
    return customers.flatMap { it.getOrderedProductsList() }.count { it == product }
}

fun Customer.getOrderedProductsList(): List<Product> {
    return orders.flatMap { it.products }
}

My original solution:

fun Shop.getNumberOfTimesProductWasOrdered(product: Product): Int =
    customers.flatMap { it.orders }.flatMap { it.products }.count { it == product }

at the following two sites:

• https://play.kotlinlang.org/koans/Collections/Compound%20tasks/Task.kt
• https://try.kotlinlang.org/#/Kotlin%20Koans/Collections/Compound%20tasks/Task.kt

and I get

Assigning single elements to varargs in named form is forbidden

Just to add, I tried the same solution in the Playground at https://play.kotlinlang.org/ (using the same code from Shop.kt and simplified code from TestShop.kt) and it runs fine, giving the correct result.

I've attached the file with code copied from Playground.
Kotlin Playground.kt.zip

[antohaby]

Got yesterday same issue. Because of that cant make 100% progress :(

It seems that it was fixed before 888c9a1 when it was just a deprecation.

[EhsanKia]

I just hit this now. The easy temporary solution is to change the runtime to something other than 1.3 in the bottom right corner.

[ivannarino]

The bug is still there

[davidgiessing]

Just hit the bug. It is just the testcase that is (now) wrong since it tries to assign a single value in named form to a collection. However @EhsanKia s temporary workaround does indeed work.

[h8]

The bug is still not fixed, and looks like there is no way to change the Kotlin version in Koans.

[regulus33]

Still there for me too :( its a shame I won't be able to get satisfaction of seeing 100% in the progress bar now 😢

[mgwizdal]

Its still not working :(

[AlexanderPrendota]

@mgwizdal please hard refresh the page

[mgwizdal]

@AlexanderPrendota Tried on different browsers and refreshsed hard - still the same issue

[AlexanderPrendota]

Please try one in private mode. Maybe it helps. Thanks