Stemmer package provides an interface for stemmers and includes English, German and Dutch stemmers as sub-packages:

• porter2 sub-package implements English (Porter2) stemmer as described in https://snowball.tartarus.org/algorithms/english/stemmer.html

• german sub-package implements German stemmer as described in https://snowball.tartarus.org/algorithms/german/stemmer.html

• dutch sub-package implements Dutch stemmer as described in https://snowball.tartarus.org/algorithms/dutch/stemmer.html

English stemmer:

go get github.com/dchest/stemmer/porter2

German stemmer:

go get github.com/dchest/stemmer/german

Dutch stemmer:

go get github.com/dchest/stemmer/dutch

This will also install the top-level stemmer package.

import (
    "github.com/dchest/stemmer/porter2"
    "github.com/dchest/stemmer/german"
    "github.com/dchest/stemmer/dutch"
)

// English.
eng := porter2.Stemmer
eng.Stem("delicious")   // => delici
eng.Stem("deliciously") // => delici

// German.
ger := german.Stemmer
ger.Stem("abhängen")   // => abhang
ger.Stem("abhängiger") // => abhang

// Dutch.
dt := dutch.Stemmer
dt.Stem("lichamelijke") // => licham
dt.Stem("opglimpende")  // => opglimp

Included test_output.txt and test_voc.txt are from the referenced original implementations, used only when running tests with go test.

2-clause BSD-like (see LICENSE and AUTHORS files).