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Day10 even more streamy

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Bas Dado
2019-12-14 19:19:59 +01:00
parent ab7a6aa486
commit dc1149971f
1 changed files with 10 additions and 10 deletions
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src/main/kotlin/com/basdado/adventofcode/day10/Day10.kt
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@@ -4,7 +4,6 @@ import com.basdado.adventofcode.lines
import java.util.stream.Collectors import java.util.stream.Collectors
import java.util.stream.IntStream import java.util.stream.IntStream
import java.util.stream.Stream import java.util.stream.Stream
import java.util.stream.StreamSupport
import kotlin.math.PI import kotlin.math.PI
import kotlin.math.abs import kotlin.math.abs
import kotlin.math.atan2 import kotlin.math.atan2
@@ -33,16 +32,17 @@ object Day10 {
.entries .entries
.sortedBy { val angle = (it.key.angle() + 0.5 * PI); if (angle < 0) 2*PI + angle else angle } .sortedBy { val angle = (it.key.angle() + 0.5 * PI); if (angle < 0) 2*PI + angle else angle }
.map { it.value.sortedBy( Vector2i::manhattan ) } .map { it.value.sortedBy( Vector2i::manhattan ) }
val sortedAsteroidIterators = sortedAsteroidLists.map { it.iterator() }
val asteroid200 = optimalAsteroid.first + IntStream.range(0, 1000000) val sortedAsteroidIterators = sortedAsteroidLists.map { it.iterator() }
.mapToObj { sortedAsteroidIterators[it % sortedAsteroidIterators.size] } val asteroid200 = optimalAsteroid.first +
.sequential() Stream.generate { sortedAsteroidIterators.stream() }
.filter { it.hasNext() } .flatMap { it }
.map { it.next() } .sequential()
.skip(199) .filter { it.hasNext() }
.findFirst() .map { it.next() }
.get() .skip(199)
.findFirst()
.get()
println(asteroid200.x * 100 + asteroid200.y) println(asteroid200.x * 100 + asteroid200.y)
} }