cleanup

2017/src/main/scala/aoc2017/Day20.scala

@@ -1,6 +1,7 @@
 package aoc2017
 
 import nmcb.*
+import nmcb.predef.*
 
 object Day20 extends AoC:
 
@@ -19,11 +20,7 @@ object Day20 extends AoC:
         position = position + velocity + acceleration,
         velocity = velocity + acceleration
       )
-
-  extension [A](t: (A,Int))
-    def element: A = t._1
-    def index: Int = t._2
-
+
   extension (particles: Vector[Particle])
 
     def tick: Vector[Particle] =

2025/src/main/scala/aoc2025/Day09.scala

@@ -8,7 +8,7 @@ object Day09 extends AoC:
 
   type Position = (x: Long, y: Long)
 
-  extension (pair: (Position,Position))
+  extension (pair: (Position, Position))
 
     def area: Long =
       val dx = (pair.left.x - pair.right.x).abs
@@ -37,7 +37,7 @@ object Day09 extends AoC:
 
   val perimeter: Set[Position] = perimeter(corners)
 
-  given order: Ordering[(Position,Position)] = Ordering.by(_.area)
+  given order: Ordering[(Position, Position)] = Ordering.by(_.area)
 
   override lazy val answer1: Long = corners.pairs(using order).drain.area
   override lazy val answer2: Long = corners.pairs(using order.reverse).findFirst((a,b) => isValid(a, b, perimeter)).area

2025/src/main/scala/aoc2025/Day10.scala

@@ -3,7 +3,6 @@ package aoc2025
 import nmcb.*
 import nmcb.predef.*
 
-import scala.CanEqual.derived
 import scala.annotation.*
 
 object Day10 extends AoC:

nmcb/src/main/scala/nmcb/predef.scala

@@ -28,20 +28,20 @@ object predef:
 
   extension [A](i: Iterable[A])
 
-    def slidingPairs: Iterable[(A,A)] =
+    def slidingPairs: Iterable[(A, A)] =
       if i.isEmpty then Nil else i.zip(i.tail)
 
-    def allPairs: Seq[(A,A)] =
+    def allPairs: Seq[(A, A)] =
       i.tails.toSeq.tail.flatMap(i.zip)
 
-    def pairs[B](): Iterator[(A,A)] =
+    def pairs[B](): Iterator[(A, A)] =
       i.tails
         .toVector
         .tail
         .flatMap(i.zip)
         .iterator
 
-    def pairs[B](using Ordering[(A,A)]): Iterator[(A,A)] =
+    def pairs[B](using Ordering[(A,A)]): Iterator[(A, A)] =
       i.tails
         .toVector
         .tail
@@ -65,11 +65,11 @@ object predef:
 
 
   extension [A](s: Seq[A])
-    def toTuple: (A,A) = (s(0), s(1))
+    def toTuple: (A, A) = (s(0), s(1))
 
 
-  def memo[K,V](initial: (K,V)*): mutable.Map[K,V] =
-    mutable.Map.empty[K,V] ++ initial
+  def memo[K,V](initial: (K,V )*): mutable.Map[K, V] =
+    mutable.Map.empty[K, V] ++ initial
 
 
   extension [K,V](cache: mutable.Map[K,V])