[Core] Prevent negative coordinates from inadvertantly indexing from …

…the end of the array
tobymao · Jan 30, 2025 · 138c40e · 138c40e
1 parent c90c43d
commit 138c40e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/engine/stock_movement.rb b/lib/engine/stock_movement.rb
@@ -8,6 +8,8 @@ def initialize(market)
 
     def share_price(coordinates)
       row, column = coordinates
+      return if row.negative? || column.negative?
+
       @market.market[row]&.[](column)
     end