[leet] game of life-re (mid)

Author: hyeonbinHur

허현빈/8주차/Game of Life.js

@@ -0,0 +1,48 @@
+/**
+ * @param {number[][]} board
+ * @return {void} Do not return anything, modify board in-place instead.
+ */
+var gameOfLife = function (board) {
+  const newBoard = Array.from({ length: board.length }, () =>
+    Array.from({ length: board[0].length }).fill(0)
+  );
+  const dir = [
+    [1, 0],
+    [-1, 0],
+    [0, 1],
+    [0, -1],
+    [-1, -1],
+    [1, 1],
+    [1, -1],
+    [-1, 1],
+  ];
+
+  for (let i = 0; i < board.length; i++) {
+    for (let j = 0; j < board[0].length; j++) {
+      let zeroCount = 0;
+      for (let k = 0; k < dir.length; k++) {
+        const ny = i + dir[k][0];
+        const nx = j + dir[k][1];
+        if (ny >= 0 && ny < board.length && nx >= 0 && nx < board[0].length) {
+          if (board[ny][nx] === 1) {
+            zeroCount++;
+          }
+        }
+      }
+      if (board[i][j] === 1 && zeroCount <= 1) {
+        newBoard[i][j] = 0;
+      } else if (board[i][j] === 1 && (zeroCount === 2 || zeroCount === 3)) {
+        newBoard[i][j] = 1;
+      } else if (board[i][j] === 1 && zeroCount > 3) {
+        newBoard[i][j] = 0;
+      } else if (board[i][j] === 0 && zeroCount === 3) {
+        newBoard[i][j] = 1;
+      }
+    }
+  }
+  for (let i = 0; i < board.length; i++) {
+    for (let j = 0; j < board[0].length; j++) {
+      board[i][j] = newBoard[i][j];
+    }
+  }
+};