Made Day10 more streamy

src/main/kotlin/com/basdado/adventofcode/day10/Day10.kt

@@ -2,6 +2,9 @@ package com.basdado.adventofcode.day10
 
 import com.basdado.adventofcode.lines
 import java.util.stream.Collectors
+import java.util.stream.IntStream
+import java.util.stream.Stream
+import java.util.stream.StreamSupport
 import kotlin.math.PI
 import kotlin.math.abs
 import kotlin.math.atan2
@@ -30,22 +33,17 @@ object Day10 {
             .entries
             .sortedBy { val angle = (it.key.angle() + 0.5 * PI); if (angle < 0) 2*PI + angle else angle }
             .map { it.value.sortedBy( Vector2i::manhattan ) }
-        // And now we're gonna keep taking one of each list until we reach number 200
+        val sortedAsteroidIterators = sortedAsteroidLists.map { it.iterator() }
-        var listIndex = 0
+
-        val itemIndexPerList = IntArray(sortedAsteroidLists.size)
+        val asteroid200 = optimalAsteroid.first + IntStream.range(0, 1000000)
-        var i = 0
+            .mapToObj { sortedAsteroidIterators[it % sortedAsteroidIterators.size] }
-        var curItem: Vector2i? = null
+            .sequential()
-        while (i < 200) {
+            .filter { it.hasNext() }
-            val list = sortedAsteroidLists[listIndex]
+            .map { it.next() }
-            if (itemIndexPerList[listIndex] < list.size) {
+            .skip(199)
-                curItem = list[itemIndexPerList[listIndex]]
+            .findFirst()
-//                println(optimalAsteroid.first + curItem)
+            .get()
-                itemIndexPerList[listIndex]++
+
-                i++
-            }
-            listIndex++
-        }
-        val asteroid200 = optimalAsteroid.first + curItem!!
         println(asteroid200.x * 100 + asteroid200.y)
     }