Dmitry Petrov
17 lines
349 B
Kotlin
Vendored
17 lines
349 B
Kotlin
Vendored
// WITH_SIGNATURES
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// FILE: t.kt
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fun main(x: DataStream<Int>) {
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x.keyBy({ it.toLong() })
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x.keyBy(KeySelector<Int, Long>{ it.toLong() })
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}
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// FILE: KeySelector.java
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public interface KeySelector<IN, KEY> {
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KEY getKey(IN value);
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}
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// FILE: DataStream.java
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public class DataStream<T> {
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public <K> void keyBy(KeySelector<T,K> key) {}
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}
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