// toInternal converts a feature vector to internal format. It requires write lock for intern. func (v FeatureVector) toInternal(intern *intern.Intern) (fVectorForScores, fVector, error) { full := make(fVector, 0, len(v)) err := nested.Flatten(data.Map(v), func(key string, value float32) { full = append(full, fElement{dim(intern.Get(key)), value}) }) if err != nil { return nil, nil, err } return fVectorForScores(full), full, nil }