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42 lines
1.5 KiB
Kotlin
42 lines
1.5 KiB
Kotlin
class MyList<T>(val v: T): List<T> {
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override fun size(): Int = 0
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override fun isEmpty(): Boolean = true
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override fun contains(o: Any?): Boolean = false
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override fun iterator(): Iterator<T> = throw Error()
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override fun containsAll(c: Collection<Any?>): Boolean = false
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override fun get(index: Int): T = v
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override fun indexOf(o: Any?): Int = -1
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override fun lastIndexOf(o: Any?): Int = -1
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override fun listIterator(): ListIterator<T> = throw Error()
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override fun listIterator(index: Int): ListIterator<T> = throw Error()
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override fun subList(fromIndex: Int, toIndex: Int): List<T> = throw Error()
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override fun hashCode(): Int = 0
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override fun equals(other: Any?): Boolean = false
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public fun add(e: T): Boolean = true
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public fun remove(o: Any?): Boolean = true
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public fun addAll(c: Collection<T>): Boolean = true
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public fun addAll(index: Int, c: Collection<T>): Boolean = true
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public fun removeAll(c: Collection<Any?>): Boolean = true
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public fun retainAll(c: Collection<Any?>): Boolean = true
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public fun clear() {}
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public fun set(index: Int, element: T): T = element
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public fun add(index: Int, element: T) {}
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public fun remove(index: Int): T = v
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}
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fun box(): String {
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val list = MyList<String>("") as MutableList<String>
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list.add("")
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list.remove("")
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list.addAll(list)
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list.removeAll(list)
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list.retainAll(list)
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list.clear()
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list.set(0, "")
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list.add(0, "")
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list.remove(0)
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return "OK"
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} |