Zalim Bashorov
110 lines
2.4 KiB
Kotlin
110 lines
2.4 KiB
Kotlin
package foo
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import js.*
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class RangeIterator(val start: Int, var count: Int, val reversed: Boolean) {
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var i = start
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fun next(): Int {
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--count
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if (reversed) {
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i--
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return i + 1
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}
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else {
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i++
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return i - 1
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}
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}
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fun hasNext() = (count > 0);
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}
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class NumberRange(val start: Int, val size: Int, val reversed: Boolean) {
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val end: Int
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get() = if (reversed) start - size + 1 else start + size - 1
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fun contains(number: Int): Boolean {
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if (reversed) {
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return (number <= start) && (number > start - size);
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}
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else {
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return (number >= start) && (number < start + size);
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}
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}
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fun iterator() = RangeIterator(start, size, reversed);
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}
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fun box() = testRange() && testReversedRange();
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fun testRange(): Boolean {
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val oneToFive = NumberRange(1, 4, false);
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if (oneToFive.contains(5)) return false;
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if (oneToFive.contains(0)) return false;
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if (oneToFive.contains(-100)) return false;
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if (oneToFive.contains(10)) return false;
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if (!oneToFive.contains(1)) return false;
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if (!oneToFive.contains(2)) return false;
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if (!oneToFive.contains(3)) return false;
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if (!oneToFive.contains(4)) return false;
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if (!(oneToFive.start == 1)) return false;
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if (!(oneToFive.size == 4)) return false;
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if (!(oneToFive.end == 4)) return false;
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var sum = 0;
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for (i in oneToFive) {
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sum += i;
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}
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for (i in oneToFive) {
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print(i)
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}
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if (sum != 10) return false;
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return true;
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}
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fun testReversedRange(): Boolean {
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println("Testing reversed range.");
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val tenToFive = NumberRange(10, 5, true);
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if (tenToFive.contains(5)) return false;
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if (tenToFive.contains(11)) return false;
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if (tenToFive.contains(-100)) return false;
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if (tenToFive.contains(1000)) return false;
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if (!tenToFive.contains(6)) return false;
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if (!tenToFive.contains(7)) return false;
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if (!tenToFive.contains(8)) return false;
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if (!tenToFive.contains(9)) return false;
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if (!tenToFive.contains(10)) return false;
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if (!(tenToFive.start == 10)) return false;
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if (!(tenToFive.size == 5)) return false;
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if (!(tenToFive.end == 6)) return false;
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for (i in tenToFive) {
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println(i)
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}
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var sum = 0;
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for (i in tenToFive) {
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sum += i;
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}
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if (sum != 40) {
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return false;
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}
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return true;
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}
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