// 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.
//
// ## tokens
// ### appendBigrams
/**
*
* Generates bigrams from the input tokens and appends them to the input tokens.
*
* @alias tokens#appendBigrams
* @param {string[]} tokens the input tokens.
* @return {string[]} the input tokens appended with their bigrams.
* @example
* appendBigrams( [ 'he', 'acted', 'decisively', 'today' ] );
* // -> [ 'he',
* // 'acted',
* // 'decisively',
* // 'today',
* // 'he_acted',
* // 'acted_decisively',
* // 'decisively_today' ]
*/
var appendBigrams = function ( tokens ) {
var i, imax;
for ( i = 0, imax = tokens.length - 1; i < imax; i += 1 ) {
tokens.push( tokens[ i ] + '_' + tokens[ i + 1 ] );
}
return tokens;
}; // appendBigrams()
module.exports = appendBigrams;