在Kotlin中,模板方法模式可以通过以下几种方式进行优化:
fun <T> Iterable<T>.process(): List<T> {
val result = mutableListOf<T>()
for (item in this) {
result.add(processItem(item))
}
return result
}
fun processItem(item: Int): Int {
return item * 2
}
fun main() {
val numbers = listOf(1, 2, 3, 4, 5)
val doubledNumbers = numbers.process()
println(doubledNumbers) // 输出: [2, 4, 6, 8, 10]
}
fun <T, R> process(items: Iterable<T>, transform: (T) -> R): List<R> {
return items.map(transform)
}
fun main() {
val numbers = listOf(1, 2, 3, 4, 5)
val doubledNumbers = process(numbers) { it * 2 }
println(doubledNumbers) // 输出: [2, 4, 6, 8, 10]
}
class Processor {
private val delegate: (Int) -> Int = { it * 2 }
fun process(item: Int): Int {
return delegate(item)
}
}
fun main() {
val processor = Processor()
val numbers = listOf(1, 2, 3, 4, 5)
val doubledNumbers = numbers.map { processor.process(it) }
println(doubledNumbers) // 输出: [2, 4, 6, 8, 10]
}
fun Int.process(): Int {
return this * 2
}
fun main() {
val numbers = listOf(1, 2, 3, 4, 5)
val doubledNumbers = numbers.map { it.process() }
println(doubledNumbers) // 输出: [2, 4, 6, 8, 10]
}
通过这些优化方法,你可以使Kotlin中的模板方法模式更加简洁、高效和易于维护。