Create 1958-check-if-move-is-legal.js

Author: AP-Repositories

javascript/1958-check-if-move-is-legal.js

@@ -0,0 +1,27 @@
+var checkMove = function(board, rMove, cMove, color) {
+    const ROWS = board.length, COLS = board[0].length;
+    let direction = [[1, 0], [-1, 0], [0, 1], [0, -1],
+                     [1, 1], [-1, -1], [1, -1], [-1, 1]];
+    board[rMove][cMove] = color;
+    
+    let legal = function(row, col, color, direc) {
+        let dr = direc[0], dc = direc[1];
+        row = row + dr;
+        col = col + dc;
+        let length = 1;
+        
+        while(0 <= row && row < ROWS && 0 <= col && col < COLS) {
+            length += 1;
+            if(board[row][col] == '.') return false;
+            if(board[row][col] == color)
+                return length >= 3;
+            row = row + dr;
+            col = col + dc;
+        }
+        return false;
+    }
+    
+    for(const d of direction)
+        if(legal(rMove, cMove, color, d)) return true;
+    return false;
+};