// 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.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// DEALINGS IN THE SOFTWARE.
//
var defaultStopWords = require( './dictionaries/stop_words.json' );
var words = require( './helper-return-words-filter.js' );
defaultStopWords = words( defaultStopWords );
// ## tokens
// ### removeWords
/**
*
* Removes the stop words from the input array of tokens.
*
* @alias tokens#removeWords
* @param {string[]} tokens the input tokens.
* @param {wordsFilter} [stopWords=defaultStopWords] default stop words are
* loaded from `stop_words.json` located under the `src/dictionaries/` directory.
* Custom stop words can be created using [helper.returnWordsFilter ](#helperreturnwordsfilter).
* @return {string[]} balance tokens.
* @example
* removeWords( [ 'this', 'is', 'a', 'cat' ] );
* // -> [ 'cat' ]
*/
var removeWords = function ( tokens, stopWords ) {
var givenStopWords = ( stopWords || defaultStopWords );
return tokens.filter( givenStopWords.exclude );
}; // removeWords()
module.exports = removeWords;