Function createPositionalPseudo

2.0.3/Sizzle-annotation.js:466–482

* Returns a function to use in pseudos for positionals * @param {Function} fn

(fn)

	 */

	function createPositionalPseudo(fn) {
		return markFunction(function(argument) {
			argument = +argument;
			return markFunction(function(seed, matches) {
				var j,
					matchIndexes = fn([], seed.length, argument),
					i = matchIndexes.length;

				// Match elements found at the specified indexes
				while (i--) {
					if (seed[(j = matchIndexes[i])]) {
						seed[j] = !(matches[j] = seed[j]);
					}
				}
			});
		});
	}

	/**
	 * Detect xml