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github.com/jmcarbo/stopwords
stopwords is a go package that removes stop words from a text content. If instructed to do so, it will remove HTML tags and parse HTML entities. The objective is to prepare a text in view to be used by natural processing algos or text comparison algorithms such as SimHash.
It uses a curated list of the most frequent words used in these languages:
If the function is used with an unsupported language, it doesn't fail, but will apply english filter to the content.
You can find an example here https:github.com/bbalet/gorelated where stopwords package is used in conjunction with SimHash algorithm in order to find a list of related content for a static website generator:
import (
"github.com/bbalet/stopwords"
)
//Example with 2 strings containing P html tags
//"la", "un", etc. are (stop) words without lexical value in French
string1 := []byte("<p>la fin d'un bel après-midi d'été</p>")
string2 := []byte("<p>cet été, nous avons eu un bel après-midi</p>")
//Return a string where HTML tags and French stop words has been removed
cleanContent := stopwords.CleanString(string1, "fr", true)
//Get two (Sim) hash representing the content of each string
hash1 := stopwords.Simhash(string1, "fr", true)
hash2 := stopwords.Simhash(string2, "fr", true)
//Hamming distance between the two strings (diffference between contents)
distance := stopwords.CompareSimhash(hash1, hash2)
//Clean the content of string1 and string2, compute the Levenshtein Distance
stopwords.LevenshteinDistance(string1, string2, "fr", true)
Where fr is the ISO 639-1 code for French (it accepts a BCP 47 tag as well). https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
This package comes with a predefined list of stopwords. However, two functions allow you to use your own list of words:
stopwords.LoadStopWordsFromFile(filePath, langCode, separator)
stopwords.LoadStopWordsFromString(wordsList, langCode, separator)
They will overwrite the predefined words for a given language.
You can find an example with the file stopwords.txt
If you don't want to strip the Unicode Characters of the 'Number, Decimal Digit'
Category, call the function DontStripDigits
before using the package :
stopwords.DontStripDigits()
If you want to use your own segmenter, you can overwrite the regular expression:
stopwords.OverwriteWordSegmenter(`[\pL]+`)
Please note that this library doesn't break words. If you want to break words prior using stopwords, you need to use another library that provides a binding to ICU library.
These curated lists contain the most used words in various topics, they were not built with a corpus limited to any given specialized topic.
Most of the lists were built by IR Multilingual Resources at UniNE http://members.unine.ch/jacques.savoy/clef/index.html
stopwords is released under the BSD license.
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