// 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”.
//
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// 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
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//
// ## string
// ### ngram
/**
*
* Generates an array of ngrams of a specified size from the input string. The
* default size is 2, which means it will generate bigrams by default.
*
* @alias string#ngram
* @param {string} str the input string.
* @param {number} [size=2] ngram's size.
* @return {string[]} ngrams of `size` from `str`.
* @example
* ngram( 'FRANCE' );
* // -> [ 'FR', 'RA', 'AN', 'NC', 'CE' ]
* ngram( 'FRENCH' );
* // -> [ 'FR', 'RE', 'EN', 'NC', 'CH' ]
* ngram( 'FRANCE', 3 );
* // -> [ 'FRA', 'RAN', 'ANC', 'NCE' ]
*/
var ngram = function ( str, size ) {
var ng = ( size || 2 ),
ngramz = [],
tg;
for ( var i = 0, imax = str.length; i < imax; i += 1 ) {
tg = str.slice( i, i + ng );
if ( tg.length === ng ) ngramz.push( tg );
}
return ( ngramz );
}; // ngram()
module.exports = ngram;