feat: add select and reduce methods to HtmlTree class; update examples in main.rb

lab3_task1_funcation_block_arg/main.rb

@@ -1,9 +1,9 @@
+# add examples for sort and sort)by
 
 def indices_sorted_by_descending_values(array)
     array.each_with_index.to_a
       .sort_by { |(element, index)| -element }
       .map { |(element, index)| index }
-    
 end
 
 

lab3_task3_html_tree/main.rb

@@ -4,7 +4,7 @@ class HtmlTree
   include Enumerable
 
   def initialize(html)
-    puts "Input HTML:\n#{html.inspect}" # Проверяем входной HTML
+    puts "Input HTML:\n#{html.inspect}"
     @root = parse_html(html)
     raise "Parsed HTML tree is empty" if @root.nil?
   end
@@ -20,6 +20,21 @@ class HtmlTree
     end
   end
 
+  def select(order = :breadth_first, &block)
+    results = []
+    each(order) do |node|
+      results << node if block.call(node)
+    end
+    results
+  end
+
+  def reduce(accumulator = nil, order = :breadth_first, &block)
+    each(order) do |node|
+      accumulator = block.call(accumulator, node)
+    end
+    accumulator
+  end
+
   private
 
   def parse_html(html)
@@ -92,4 +107,12 @@ puts "Traversal in breadth-first order:"
 tree.each(:breadth_first) { |tag| puts tag }
 
 puts "\nTraversal in depth-first order:"
-tree.each(:depth_first) { |tag| puts tag }
+tree.each(:depth_first) { |tag| puts tag }
+
+puts "Select tags with class 'text':"
+selected_tags = tree.select { |tag| tag.attributes["class"] == "text" }
+puts selected_tags
+
+puts "\nReduce example (concatenate all tag names):"
+reduced_value = tree.reduce("") { |acc, tag| acc + " " + tag.name }
+puts reduced_value.strip