# Functions
NewIdf creates a new Idf instance.
NewStopWord create a new StopWord with default stop words.
# Variables
DefaultStopWordMap contains some stop words.
# Structs
Idf represents a thread-safe dictionary for all words with their IDFs(Inverse Document Frequency).
Segment represents a word with weight.
StopWord is a thread-safe dictionary for all stop words.
TagExtracter is used to extract tags from sentence.
TextRanker is used to extract tags from sentence.
# Type aliases
Segments represents a slice of Segment.