From 1aeeaa780e727e467443d6c821947413566b5b51 Mon Sep 17 00:00:00 2001
From: David Ashby <delta.mu.alpha@gmail.com>
Date: Thu, 4 Dec 2025 22:23:26 -0500
Subject: [PATCH] split out helper method

---
 src/Day04.java | 48 ++++++++++++++++++++++--------------------------
 1 file changed, 22 insertions(+), 26 deletions(-)

diff --git a/src/Day04.java b/src/Day04.java
index af80257..092f9e9 100644
--- a/src/Day04.java
+++ b/src/Day04.java
@@ -51,19 +51,11 @@ public class Day04 {
                     int x = Integer.parseInt(coords[0]);
                     int y = Integer.parseInt(coords[1]);
                     neighbors = 0;
-                    List.of(
-                            "%s-%s".formatted(x - 1, y),
-                            "%s-%s".formatted(x + 1, y),
-                            "%s-%s".formatted(x, y - 1),
-                            "%s-%s".formatted(x, y + 1),
-                            "%s-%s".formatted(x + 1, y - 1),
-                            "%s-%s".formatted(x - 1, y - 1),
-                            "%s-%s".formatted(x + 1, y + 1),
-                            "%s-%s".formatted(x - 1, y + 1)).forEach((coord) -> {
-                                if (floor.getOrDefault(coord, false)) {
-                                    neighbors += 1;
-                                }
-                            });
+                    generateNeighborKeys(x, y).forEach((coord) -> {
+                        if (floor.getOrDefault(coord, false)) {
+                            neighbors += 1;
+                        }
+                    });
                     if (neighbors < 4) {
                         score += 1;
                     }
@@ -103,19 +95,11 @@ public class Day04 {
                         int x = Integer.parseInt(coords[0]);
                         int y = Integer.parseInt(coords[1]);
                         neighbors = 0;
-                        List.of(
-                                "%s-%s".formatted(x - 1, y),
-                                "%s-%s".formatted(x + 1, y),
-                                "%s-%s".formatted(x, y - 1),
-                                "%s-%s".formatted(x, y + 1),
-                                "%s-%s".formatted(x + 1, y - 1),
-                                "%s-%s".formatted(x - 1, y - 1),
-                                "%s-%s".formatted(x + 1, y + 1),
-                                "%s-%s".formatted(x - 1, y + 1)).forEach((coord) -> {
-                                    if (floor.getOrDefault(coord, false)) {
-                                        neighbors += 1;
-                                    }
-                                });
+                        generateNeighborKeys(x, y).forEach((coord) -> {
+                            if (floor.getOrDefault(coord, false)) {
+                                neighbors += 1;
+                            }
+                        });
                         if (neighbors < 4) {
                             round += 1;
                             newFloor.put(key, false);
@@ -135,4 +119,16 @@ public class Day04 {
             IO.println(e.getMessage());
         }
     }
+
+    private static List<String> generateNeighborKeys(int x, int y) {
+        return List.of(
+                "%s-%s".formatted(x - 1, y),
+                "%s-%s".formatted(x + 1, y),
+                "%s-%s".formatted(x, y - 1),
+                "%s-%s".formatted(x, y + 1),
+                "%s-%s".formatted(x + 1, y - 1),
+                "%s-%s".formatted(x - 1, y - 1),
+                "%s-%s".formatted(x + 1, y + 1),
+                "%s-%s".formatted(x - 1, y + 1));
+    }
 }