// 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.
//
// ## string
// ### setOfWords
/**
*
* Generates the set of words from the input string. It also has an alias **`sow()`**.
*
* @alias tokens#setOfWords
* @param {string[]} tokens the input tokens.
* @param {function} [ifn=undefined] a function to build index; it is called for
* every **member word of the set **; and it receives the word and the `idx`
* as input arguments. The `build()` function of [helper.returnIndexer](#helperreturnindexer)
* may be used as `ifn`. If `undefined` then index is not built.
* @param {number} [idx=undefined] the index; passed as the second argument to the `ifn`
* function.
* @return {set} of words from tokens.
* @example
* setOfWords( [ 'rain', 'rain', 'go', 'away' ] );
* // -> Set { 'rain', 'go', 'away' }
*/
var setOfWords = function ( tokens, ifn, idx ) {
var tset = new Set( tokens );
if ( typeof ifn === 'function' ) {
tset.forEach( function ( m ) {
ifn( m, idx );
} );
}
return ( tset );
}; // bow()
module.exports = setOfWords;