Evgeny Gerashchenko
26 lines
650 B
Kotlin
26 lines
650 B
Kotlin
open class IIterator<out T> {
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fun next() : T
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val hasNext : Boolean
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fun toArray(buffer : MutableArray<in T>) : Int { // T is still an in-parameter
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return fillBuffer(buffer, 0, buffer.size)
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}
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fun toArray(buffer : MutableArray<in T>, from : Int, length : Int) : Int { // T is still an in-parameter
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if (from < 0 || from > buffer.lastIndex || length < 0 || length > buffer.size - from) {
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throw IndexOutOfBoundsException();
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}
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if (len == 0) return 0
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var count = 0;
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for (i in from .. from + length - 1) {
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if (!hasNext)
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return count
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buffer[i] = next()
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count++
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}
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return count
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}
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}
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