Replace map + compact with filter_map

actioncable/lib/action_cable/channel/test_case.rb

@@ -246,7 +246,7 @@ def perform(action, data = {})
         # Returns messages transmitted into channel
         def transmissions
           # Return only directly sent message (via #transmit)
-          connection.transmissions.map { |data| data["message"] }.compact
+          connection.transmissions.filter_map { |data| data["message"] }
         end
 
         # Enhance TestHelper assertions to handle non-String

actioncable/lib/action_cable/connection/identification.rb

@@ -26,7 +26,7 @@ def identified_by(*identifiers)
       # Return a single connection identifier that combines the value of all the registered identifiers into a single gid.
       def connection_identifier
         unless defined? @connection_identifier
-          @connection_identifier = connection_gid identifiers.map { |id| instance_variable_get("@#{id}") }.compact
+          @connection_identifier = connection_gid identifiers.filter_map { |id| instance_variable_get("@#{id}") }
         end
 
         @connection_identifier

actionpack/lib/abstract_controller/caching.rb

@@ -50,7 +50,7 @@ def view_cache_dependency(&dependency)
     end
 
     def view_cache_dependencies
-      self.class._view_cache_dependencies.map { |dep| instance_exec(&dep) }.compact
+      self.class._view_cache_dependencies.filter_map { |dep| instance_exec(&dep) }
     end
 
     private

actionpack/lib/action_controller/metal/rendering.rb

@@ -26,7 +26,7 @@ def inherited(klass)
 
     # Before processing, set the request formats in current controller formats.
     def process_action(*) #:nodoc:
-      self.formats = request.formats.map(&:ref).compact
+      self.formats = request.formats.filter_map(&:ref)
       super
     end
 

actionpack/lib/action_controller/metal/strong_parameters.rb

@@ -955,7 +955,7 @@ def convert_value_to_parameters(value)
       def each_element(object, &block)
         case object
         when Array
-          object.grep(Parameters).map { |el| yield el }.compact
+          object.grep(Parameters).filter_map { |el| yield el }
         when Parameters
           if object.nested_attributes?
             object.each_nested_attribute(&block)

actiontext/lib/action_text/attachment.rb

@@ -20,7 +20,7 @@ def from_node(node, attachable = nil)
       end
 
       def from_attachables(attachables)
-        Array(attachables).map { |attachable| from_attachable(attachable) }.compact
+        Array(attachables).filter_map { |attachable| from_attachable(attachable) }
       end
 
       def from_attachable(attachable, attributes = {})

actionview/test/template/digestor_test.rb

@@ -363,7 +363,7 @@ def nested_dependencies(template_name)
 
     def tree_template_formats(template_name)
       tree = ActionView::Digestor.tree(template_name, finder)
-      tree.flatten.map(&:template).compact.map(&:format)
+      tree.flatten.filter_map { |node| node.template&.format }
     end
 
     def disable_resolver_caching

activerecord/Rakefile

@@ -119,7 +119,7 @@ end
           n = ENV["BUILDKITE_PARALLEL_JOB"].to_i
           m = ENV["BUILDKITE_PARALLEL_JOB_COUNT"].to_i
 
-          test_files = test_files.each_slice(m).map { |slice| slice[n] }.compact
+          test_files = test_files.each_slice(m).filter_map { |slice| slice[n] }
         end
 
         test_files.each do |file|

activerecord/lib/active_record/nested_attributes.rb

@@ -486,7 +486,7 @@ def assign_nested_attributes_for_collection_association(association_name, attrib
         existing_records = if association.loaded?
           association.target
         else
-          attribute_ids = attributes_collection.map { |a| a["id"] || a[:id] }.compact
+          attribute_ids = attributes_collection.filter_map { |a| a["id"] || a[:id] }
           attribute_ids.empty? ? [] : association.scope.where(association.klass.primary_key => attribute_ids)
         end
 

activerecord/lib/arel/select_manager.rb

@@ -96,7 +96,7 @@ def from(table)
     end
 
     def froms
-      @ast.cores.map { |x| x.from }.compact
+      @ast.cores.filter_map { |x| x.from }
     end
 
     def join(relation, klass = Nodes::InnerJoin)

railties/lib/rails/commands/dbconsole/dbconsole_command.rb

@@ -31,7 +31,7 @@ def start
           sslcapath: "--ssl-capath",
           sslcipher: "--ssl-cipher",
           sslkey: "--ssl-key"
-        }.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
+        }.filter_map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }
 
         if config[:password] && @options[:include_password]
           args << "--password=#{config[:password]}"