tablesorter/js/parsers/parser-ignore-articles.js

/*! Parser: ignoreArticles - updated 9/15/2014 (v2.17.8) *//*
 * This parser will remove 'The', 'A' and 'An' from the beginning of a book
 * or movie title, so it sorts by the second word or number
 * Demo: http://jsfiddle.net/Mottie/abkNM/5/
 */
/*jshint browser: true, jquery:true, unused:false */
;(function($){
	'use strict';

	var ts = $.tablesorter;

	// basic list from http://en.wikipedia.org/wiki/Article_%28grammar%29
	ts.ignoreArticles = {
		'en' : 'the, a, an',
		'de' : 'der, die, das, des, dem, den, ein, eine, einer, eines, einem, einen',
		'nl' : 'de, het, de, een',
		'es' : 'el, la, lo, los, las, un, una, unos, unas',
		'pt' : 'o, a, os, as, um, uma, uns, umas',
		'fr' : 'le, la, l\'_, les, un, une, des',
		'it' : 'il, lo, la, l\'_, i, gli, le, un\', uno, una, un',
		'hu' : 'a, az, egy'
	};

	// To add a custom parser, define:
	// $.tablesorter.ignoreArticles['xx'] = 'A, B, C';
	// and then set the language id 'xx' in the headers option
	// ignoreArticles : 'xx'

	ts.addParser({
		id: 'ignoreArticles',
		is: function() {
			return false;
		},
		format: function(s, table, cell, cellIndex) {
			var art, ignore, lang,
				c = table.config,
				str = s || '';
			if ( !(c.headers && c.headers[cellIndex] && c.headers[cellIndex].ignoreArticlesRegex) ) {
				// initialize - save regex in c.headers[cellIndex].ignoreArticlesRegex
				if (!c.headers) { c.headers = {}; }
				if (!c.headers[cellIndex]) { c.headers[cellIndex] = {}; }
				lang = ts.getData( c.$headers.eq(cellIndex), ts.getColumnData( table, c.headers, cellIndex ), 'ignoreArticles' );
				art = (ts.ignoreArticles[lang] || 'the, a, an' ) + '';
				c.headers[cellIndex].ignoreArticlesRegex = new RegExp('^(' + $.trim( art.split(/\s*\,\s*/).join('\\s|') + '\\s' ).replace('_\\s', '') + ')', 'i');
				// exception regex stored in c.headers[cellIndex].ignoreArticlesRegex2
				ignore = ts.getData( c.$headers.eq(cellIndex), ts.getColumnData( table, c.headers, cellIndex ), 'ignoreArticlesExcept' );
				c.headers[cellIndex].ignoreArticlesRegex2 = ignore !== '' ? new RegExp('^(' + ignore.replace(/\s/g, '\\s') + ')', 'i') : '';
			}
			art = c.headers[cellIndex].ignoreArticlesRegex;
			if (art.test(str)) {
				ignore = c.headers[cellIndex].ignoreArticlesRegex2;
				if ( !(ignore && ignore.test(str)) ) {
					return str.replace(art, '');
				}
			}
			return str;
		},
		type: 'text'
	});

})(jQuery);