Created
March 6, 2022 19:42
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Complement for Distance.kt
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| import kotlin.math.abs | |
| import kotlin.math.roundToLong | |
| enum class DistanceUnit(private val orderLowerIsLarger: Int) { | |
| KILOMETERS(1), | |
| HECTOMETERS(2), | |
| DECAMETERS(3), | |
| METERS(4), | |
| DECIMETERS(5), | |
| CENTIMETERS(6), | |
| MILLIMETERS(7); | |
| fun convert(value: Double, other: DistanceUnit): Long { | |
| val firstIndex = largestFirst.indexOf(this) | |
| val lastIndex = largestFirst.indexOf(other) | |
| val (numberOfZeros, inversion) = if (firstIndex > lastIndex) { | |
| firstIndex - lastIndex to -1 | |
| } else { | |
| lastIndex - firstIndex to 1 | |
| } | |
| val factor = (0 until numberOfZeros).fold("1") { acc, _ -> | |
| acc + "0" | |
| }.toLong() * inversion | |
| return (if (factor < 0) { | |
| abs(value / factor) | |
| } else { | |
| value * factor | |
| }.roundToLong() | |
| ) } | |
| companion object { | |
| val largestFirst = values().sortedBy { it.orderLowerIsLarger } | |
| } | |
| } |
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