Add custom min and max methods

lib/sorted_containers/sorted_array.rb

@@ -254,6 +254,20 @@ def to_a
       @lists.flatten
     end
 
+    # Returns the maximum value in the sorted array.
+    #
+    # @return [Object] The maximum value in the array.
+    def max
+      @lists.last&.last
+    end
+
+    # Returns the minimum value in the sorted array.
+    #
+    # @return [Object] The minimum value in the array.
+    def min
+      @lists.first&.first
+    end
+
     # Iterates over each value in the sorted array.
     #
     # @yield [value] Gives each value to the block.

spec/sorted_array_spec.rb

@@ -181,6 +181,26 @@
     expect(array.bisect_right(0)).to eq(0)
   end
 
+  it "should return the minimum value in the array" do
+    array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
+    expect(array.min).to eq(1)
+  end
+
+  it "should return the maximum value in the array" do
+    array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
+    expect(array.max).to eq(5)
+  end
+
+  it "should return nil for the minimum value in an empty array" do
+    array = SortedContainers::SortedArray.new
+    expect(array.min).to be_nil
+  end
+
+  it "should return nil for the maximum value in an empty array" do
+    array = SortedContainers::SortedArray.new
+    expect(array.max).to be_nil
+  end
+
   it "should pop the last value from the array" do
     array = SortedContainers::SortedArray.new([1, 2, 3, 4, 5])
     expect(array.pop).to eq(5)