39 lines
834 B
Kotlin
39 lines
834 B
Kotlin
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package fixtures
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data class Person(
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val id: Int,
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val name: String,
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val email: String
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)
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class Repository<T> {
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private val items = mutableMapOf<Int, T>()
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fun add(key: Int, item: T) {
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items[key] = item
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}
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fun find(key: Int): T? = items[key]
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fun getAll(): List<T> = items.values.toList()
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}
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fun add(a: Int, b: Int): Int = a + b
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fun <T> filter(items: List<T>, predicate: (T) -> Boolean): List<T> {
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return items.filter(predicate)
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}
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fun main() {
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val repo = Repository<Person>()
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repo.add(1, Person(1, "Alice", "alice@example.com"))
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repo.add(2, Person(2, "Bob", "bob@example.com"))
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repo.getAll().forEach { println(it) }
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println("3 + 4 = ${add(3, 4)}")
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val numbers = listOf(1, 2, 3, 4, 5)
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val evens = filter(numbers) { it % 2 == 0 }
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println("Evens: $evens")
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}
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