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/*!
* lunr.stopWordFilter
* Copyright (C) @YEAR Oliver Nightingale
*/
/**
* lunr.generateStopWordFilter builds a stopWordFilter function from the provided
* list of stop words.
*
* The built in lunr.stopWordFilter is built using this generator and can be used
* to generate custom stopWordFilters for applications or non English languages.
*
* @module
* @param {Array} token The token to pass through the filter
* @returns {Function}
* @see lunr.Pipeline
* @see lunr.stopWordFilter
*/
lunr.generateStopWordFilter = function (stopWords) {
var words = stopWords.reduce(function (memo, stopWord) {
memo[stopWord] = stopWord
return memo
}, {})
return function (token) {
if (token && words[token] !== token) return token
}
}
/**
* lunr.stopWordFilter is an English language stop word list filter, any words
* contained in the list will not be passed through the filter.
*
* This is intended to be used in the Pipeline. If the token does not pass the
* filter then undefined will be returned.
*
* @module
* @param {String} token The token to pass through the filter
* @returns {String}
* @see lunr.Pipeline
*/
lunr.stopWordFilter = lunr.generateStopWordFilter([
'a',
'able',
'about',
'across',
'after',
'all',
'almost',
'also',
'am',
'among',
'an',
'and',
'any',
'are',
'as',
'at',
'be',
'because',
'been',
'but',
'by',
'can',
'cannot',
'could',
'dear',
'did',
'do',
'does',
'either',
'else',
'ever',
'every',
'for',
'from',
'get',
'got',
'had',
'has',
'have',
'he',
'her',
'hers',
'him',
'his',
'how',
'however',
'i',
'if',
'in',
'into',
'is',
'it',
'its',
'just',
'least',
'let',
'like',
'likely',
'may',
'me',
'might',
'most',
'must',
'my',
'neither',
'no',
'nor',
'not',
'of',
'off',
'often',
'on',
'only',
'or',
'other',
'our',
'own',
'rather',
'said',
'say',
'says',
'she',
'should',
'since',
'so',
'some',
'than',
'that',
'the',
'their',
'them',
'then',
'there',
'these',
'they',
'this',
'tis',
'to',
'too',
'twas',
'us',
'wants',
'was',
'we',
'were',
'what',
'when',
'where',
'which',
'while',
'who',
'whom',
'why',
'will',
'with',
'would',
'yet',
'you',
'your'
])
lunr.Pipeline.registerFunction(lunr.stopWordFilter, 'stopWordFilter')
|
