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How to use compare method of Sort Package

Best Active_mocker_ruby code snippet using Sort.compare

compare_by_identity_spec.rb

Source:compare_by_identity_spec.rb

1require File.expand_path('../../../spec_helper', __FILE__)2require 'set'3ruby_version_is '2.4' do4  describe "Set#compare_by_identity" do5    it "compares its members by identity" do6      a = "a"7      b1 = "b"8      b2 = "b"9      set = Set.new10      set.compare_by_identity11      set.merge([a, a, b1, b2])12      set.to_a.sort.should == [a, b1, b2].sort13    end14    it "causes future comparisons on the receiver to be made by identity" do15      elt = [1]16      set = Set.new17      set << elt18      set.member?(elt.dup).should be_true19      set.compare_by_identity20      set.member?(elt.dup).should be_false21    end22    it "rehashes internally so that old members can be looked up" do23      set = Set.new24      (1..10).each { |k| set << k }25      o = Object.new26      def o.hash; 123; end27      set << o28      set.compare_by_identity29      set.member?(o).should be_true30    end31    it "returns self" do32      set = Set.new33      result = set.compare_by_identity34      result.should equal(set)35    end36    it "is idempotent and has no effect on an already compare_by_identity set" do37      set = Set.new.compare_by_identity38      set << :foo39      set.compare_by_identity.should equal(set)40      set.compare_by_identity?.should == true41      set.to_a.should == [:foo]42    end43    it "uses the semantics of BasicObject#equal? to determine members identity" do44      :a.equal?(:a).should == true45      Set.new.compare_by_identity.merge([:a, :a]).to_a.should == [:a]46      ary1 = [1]47      ary2 = [1]48      ary1.equal?(ary2).should == false49      Set.new.compare_by_identity.merge([ary1, ary2]).to_a.sort.should == [ary1, ary2].sort50    end51    it "uses #equal? semantics, but doesn't actually call #equal? to determine identity" do52      set = Set.new.compare_by_identity53      obj = mock("equal")54      obj.should_not_receive(:equal?)55      set << :foo56      set << obj57      set.to_a.should == [:foo, obj]58    end59    it "does not call #hash on members" do60      elt = mock("element")61      elt.should_not_receive(:hash)62      set = Set.new.compare_by_identity63      set << elt64      set.member?(elt).should be_true65    end66    it "regards #dup'd objects as having different identities" do67      a1 = "a"68      a2 = a1.dup69      set = Set.new.compare_by_identity70      set.merge([a1, a2])71      set.to_a.sort.should == [a1, a2].sort72    end73    it "regards #clone'd objects as having different identities" do74      a1 = "a"75      a2 = a1.clone76      set = Set.new.compare_by_identity77      set.merge([a1, a2])78      set.to_a.sort.should == [a1, a2].sort79    end80    it "raises a RuntimeError on frozen sets" do81      set = Set.new.freeze82      lambda {83        set.compare_by_identity84      }.should raise_error(RuntimeError, /frozen Hash/)85    end86    it "persists over #dups" do87      set = Set.new.compare_by_identity88      set << :a89      set_dup = set.dup90      set_dup.should == set91      set_dup << :a92      set_dup.to_a.should == [:a]93    end94    it "persists over #clones" do95      set = Set.new.compare_by_identity96      set << :a97      set_clone = set.clone98      set_clone.should == set99      set_clone << :a100      set_clone.to_a.should == [:a]101    end102    it "is not equal to set what does not compare by identity" do103      Set.new([1, 2]).should == Set.new([1, 2])104      Set.new([1, 2]).should_not == Set.new([1, 2]).compare_by_identity105    end106  end107end108ruby_version_is '2.4' do109  describe "Set#compare_by_identity?" do110    it "returns false by default" do111      Set.new.compare_by_identity?.should == false112    end113    it "returns true once #compare_by_identity has been invoked on self" do114      set = Set.new115      set.compare_by_identity116      set.compare_by_identity?.should == true117    end118    it "returns true when called multiple times on the same set" do119      set = Set.new120      set.compare_by_identity121      set.compare_by_identity?.should == true122      set.compare_by_identity?.should == true123      set.compare_by_identity?.should == true124    end125  end126end...

compare_with_block.rb

Source:compare_with_block.rb

...23      #   array.min_by(&:foo)24      #   array.sort_by { |a| a[:foo] }25      class CompareWithBlock < Cop26        include RangeHelp27        MSG = 'Use `%<compare_method>s_by%<instead>s` instead of ' \28              '`%<compare_method>s { |%<var_a>s, %<var_b>s| %<str_a>s ' \29              '<=> %<str_b>s }`.'30        def_node_matcher :compare?, <<-PATTERN31          (block32            $(send _ {:sort :min :max})33            (args (arg $_a) (arg $_b))34            $send)35        PATTERN36        def_node_matcher :replaceable_body?, <<-PATTERN37          (send38            (send (lvar %1) $_method $...)39            :<=>40            (send (lvar %2) _method $...))41        PATTERN42        def on_block(node)43          compare?(node) do |send, var_a, var_b, body|44            replaceable_body?(body, var_a, var_b) do |method, args_a, args_b|45              return unless slow_compare?(method, args_a, args_b)46              range = compare_range(send, node)47              add_offense(48                node,49                location: range,50                message: message(send, method, var_a, var_b, args_a)51              )52            end53          end54        end55        def autocorrect(node)56          lambda do |corrector|57            send, var_a, var_b, body = compare?(node)58            method, arg, = replaceable_body?(body, var_a, var_b)59            replacement =60              if method == :[]61                "#{send.method_name}_by { |a| a[#{arg.first.source}] }"62              else63                "#{send.method_name}_by(&:#{method})"64              end65            corrector.replace(compare_range(send, node),66                              replacement)67          end68        end69        private70        def slow_compare?(method, args_a, args_b)71          return false unless args_a == args_b72          if method == :[]73            return false unless args_a.size == 174            key = args_a.first75            return false unless %i[sym str int].include?(key.type)76          else77            return false unless args_a.empty?78          end79          true80        end81        # rubocop:disable Metrics/MethodLength82        def message(send, method, var_a, var_b, args)83          compare_method = send.method_name84          if method == :[]85            key = args.first86            instead = " { |a| a[#{key.source}] }"87            str_a = "#{var_a}[#{key.source}]"88            str_b = "#{var_b}[#{key.source}]"89          else90            instead = "(&:#{method})"91            str_a = "#{var_a}.#{method}"92            str_b = "#{var_b}.#{method}"93          end94          format(MSG, compare_method: compare_method,95                      instead: instead,96                      var_a: var_a,97                      var_b: var_b,98                      str_a: str_a,99                      str_b: str_b)100        end101        # rubocop:enable Metrics/MethodLength102        def compare_range(send, node)103          range_between(send.loc.selector.begin_pos, node.loc.end.end_pos)104        end105      end106    end107  end108end...

compare

Using AI Code Generation

1  def self.compare(a)2    for i in 0..(a.size - 1)3      for j in (i + 1)..(a.size - 1)4  def self.compare(a)5    for i in 0..(a.size - 1)6      for j in (i + 1)..(a.size - 1)

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