Sageniuz

Sageniuz

Programming Kotlin - Sample code not compiling in postcomment.kts file (page 166)

Hi @venkats,

Unfortunately with Kotlin 1.4 following compiler error is shown for the following code in postcomment.kts

val forPost1 = PostComment(data[0])
val forPost2 = PostComment(data[1])

Error:
Type mismatch.
Required: MutableMap<String, Any>
Found: MutableMap<String, out Any>

Imho the error must be correct but is this a “typo” or is it because i use Kotlin version 1.4. If the latter is the case, do you maybe know what changed from version 1.3 to 1.4 so that now the compiler “smarter”?

Thank you.

First Post!

venkats

venkats

Author of Programming Kotlin, Rediscovering JavaScript (and 6 other titles)

Hi @Sageniuz

Thank you for mentioning this.

Modifying

val data = listOf(

to

val data: List<MutableMap<String, Any>> = listOf(

fixed the issue.

Regards,

Venkat

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