Simplify day 5 again using my own utils

Author: Zordid

src/main/kotlin/Day05_BinaryBoarding.kt

@@ -1,16 +1,17 @@
+import utils.rangeOrNull
+
 class Day05 : Day(5, title = "Binary Boarding") {
 
- val boardingPasses = mappedInput { it.toSeatId() }.sorted()
+ val boardingPassIDs = mappedInput { it.toSeatId() }
 
  fun String.toSeatId() = this
  .replace(Regex("[FL]"), "0")
  .replace(Regex("[BR]"), "1")
  .toInt(2)
 
- override fun part1() = boardingPasses.last()
+ override fun part1() = boardingPassIDs.maxOrNull()
 
- override fun part2() =
- (boardingPasses.first() until boardingPasses.last()).single { it !in boardingPasses }
+ override fun part2() = boardingPassIDs.rangeOrNull()?.single { it !in boardingPassIDs }
 
 }