Dmitry Jemerov
14 lines
973 B
Kotlin
Vendored
14 lines
973 B
Kotlin
Vendored
// "Create function" "false"
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// ERROR: A 'return' expression required in a function with a block body ('{...}')
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// ERROR: Expression 'return groupsByLength.values.firstOrNull { group -> {group.size == maximumSizeOfGroup} }' cannot be a selector (occur after a dot)
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// ERROR: Type inference failed: inline fun <T> Iterable<T>.firstOrNull(predicate: (T) -> Boolean): T?<br>cannot be applied to<br>receiver: Collection<List<String>> arguments: ((List<String>) -> () -> Boolean)<br>
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// ERROR: Type mismatch: inferred type is (List<String>) -> () -> Boolean but (List<String>) -> Boolean was expected
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// ERROR: Unresolved reference: maximumSizeOfGroup
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fun doSomethingStrangeWithCollection(collection: Collection<String>): Collection<String>? {
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val groupsByLength = collection.groupBy { s -> { s.length } }
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val maximumSizeOfGroup = groupsByLength.values.maxBy { it.size }.
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return groupsByLength.values.firstOrNull { group -> {group.size == maximumSizeOfGroup} }
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}
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