private IEnumerable FindNearDuplicates()

in DuplicateCodeDetector/CloneDetector.cs [127:152]

• 24 lines of code
• 5 McCabe index (conditional complexity)

        private IEnumerable<(string File1, string File2, double JaccardSimilarity, double KeyJacardSimilarity)> FindNearDuplicates(double keyJaccardThreshold, double jaccardThreshold, string project1, string project2)
        {
            return _index[project1].AsParallel().Where(f => !_alreadyDuplicatedFiles.ContainsKey(f.Key)).SelectMany(fileInProject1 =>
            {
                IEnumerable<(string File1, string File2, double JaccardSimilarity, double KeyJacardSimilarity)> ComputeSimilarity()
                {
                    foreach (var fileInProject2 in _index[project2].Where(f => !_alreadyDuplicatedFiles.ContainsKey(f.Key)))
                    {
                        if (fileInProject1.Key.Equals(fileInProject2.Key))
                        {
                            continue;  // The file is itself
                        }
                        var keyJaccardSimilarity = fileInProject1.Value.KeyJaccardSimilarity(fileInProject2.Value);
                        if (keyJaccardSimilarity < keyJaccardThreshold) continue;

                        var jaccardSimilarity = fileInProject1.Value.JaccardSimilarity(fileInProject2.Value);
                        if (jaccardSimilarity < jaccardThreshold) continue;

                        _alreadyDuplicatedFiles.TryAdd(fileInProject2.Key, true);
                        AddDuplicate(fileInProject1.Key, fileInProject2.Key);
                        yield return (fileInProject1.Key, fileInProject2.Key, jaccardSimilarity, keyJaccardSimilarity);
                    }
                }
                return ComputeSimilarity();
            });
        }