tokens-stem.js

//     wink-nlp-utils
//     NLP Functions for amplifying negations, managing elisions,
//     creating ngrams, stems, phonetic codes to tokens and more.
//
//     Copyright (C) GRAYPE Systems Private Limited
//
//     This file is part of “wink-nlp-utils”.
//
//     Permission is hereby granted, free of charge, to any person obtaining a
//     copy of this software and associated documentation files (the "Software"),
//     to deal in the Software without restriction, including without limitation
//     the rights to use, copy, modify, merge, publish, distribute, sublicense,
//     and/or sell copies of the Software, and to permit persons to whom the
//     Software is furnished to do so, subject to the following conditions:
//
//     The above copyright notice and this permission notice shall be included
//     in all copies or substantial portions of the Software.
//
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//     OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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//
var porter2Stemmer = require( 'wink-porter2-stemmer' );

// ## tokens

// ### stem
/**
 *
 * Stems input tokens using Porter Stemming Algorithm Version 2.
 *
 * @alias tokens#stem
 * @param {string[]} tokens the input tokens.
 * @return {string[]} stemmed tokens.
 * @example
 * stem( [ 'he', 'acted', 'decisively', 'today' ] );
 * // -> [ 'he', 'act', 'decis', 'today' ]
 */
var stem = function ( tokens ) {
  return tokens.map( porter2Stemmer );
}; // stem()

module.exports = stem;