build

docs/chapter_divide_and_conquer/binary_search_recur.md

@@ -419,6 +419,14 @@ comments: true
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="binary_search_recur.rb"
+    [class]{}-[func]{dfs}
+
+    [class]{}-[func]{binary_search}
+    ```
+
 === "Zig"
 
     ```zig title="binary_search_recur.zig"

docs/chapter_divide_and_conquer/build_binary_tree_problem.md

@@ -476,6 +476,14 @@ comments: true
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="build_tree.rb"
+    [class]{}-[func]{dfs}
+
+    [class]{}-[func]{build_tree}
+    ```
+
 === "Zig"
 
     ```zig title="build_tree.zig"

docs/chapter_divide_and_conquer/hanota_problem.md

@@ -507,6 +507,16 @@ comments: true
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title="hanota.rb"
+    [class]{}-[func]{move}
+
+    [class]{}-[func]{dfs}
+
+    [class]{}-[func]{solve_hanota}
+    ```
+
 === "Zig"
 
     ```zig title="hanota.zig"