text: define([
  	"../core",
  	"../var/indexOf",
  	"./var/rneedsContext",
  	"../selector"
  ], function( jQuery, indexOf, rneedsContext ) {
  
  var risSimple = /^.[^:#\[\.,]*$/;
  
  // Implement the identical functionality for filter and not
  function winnow( elements, qualifier, not ) {
  	if ( jQuery.isFunction( qualifier ) ) {
  		return jQuery.grep( elements, function( elem, i ) {
  			/* jshint -W018 */
  			return !!qualifier.call( elem, i, elem ) !== not;
  		});
  
  	}
  
  	if ( qualifier.nodeType ) {
  		return jQuery.grep( elements, function( elem ) {
  			return ( elem === qualifier ) !== not;
  		});
  
  	}
  
  	if ( typeof qualifier === "string" ) {
  		if ( risSimple.test( qualifier ) ) {
  			return jQuery.filter( qualifier, elements, not );
  		}
  
  		qualifier = jQuery.filter( qualifier, elements );
  	}
  
  	return jQuery.grep( elements, function( elem ) {
  		return ( indexOf.call( qualifier, elem ) >= 0 ) !== not;
  	});
  }
  
  jQuery.filter = function( expr, elems, not ) {
  	var elem = elems[ 0 ];
  
  	if ( not ) {
  		expr = ":not(" + expr + ")";
  	}
  
  	return elems.length === 1 && elem.nodeType === 1 ?
  		jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
  		jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
  			return elem.nodeType === 1;
  		}));
  };
  
  jQuery.fn.extend({
  	find: function( selector ) {
  		var i,
  			len = this.length,
  			ret = [],
  			self = this;
  
  		if ( typeof selector !== "string" ) {
  			return this.pushStack( jQuery( selector ).filter(function() {
  				for ( i = 0; i < len; i++ ) {
  					if ( jQuery.contains( self[ i ], this ) ) {
  						return true;
  					}
  				}
  			}) );
  		}
  
  		for ( i = 0; i < len; i++ ) {
  			jQuery.find( selector, self[ i ], ret );
  		}
  
  		// Needed because $( selector, context ) becomes $( context ).find( selector )
  		ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
  		ret.selector = this.selector ? this.selector + " " + selector : selector;
  		return ret;
  	},
  	filter: function( selector ) {
  		return this.pushStack( winnow(this, selector || [], false) );
  	},
  	not: function( selector ) {
  		return this.pushStack( winnow(this, selector || [], true) );
  	},
  	is: function( selector ) {
  		return !!winnow(
  			this,
  
  			// If this is a positional/relative selector, check membership in the returned set
  			// so $("p:first").is("p:last") won't return true for a doc with two "p".
  			typeof selector === "string" && rneedsContext.test( selector ) ?
  				jQuery( selector ) :
  				selector || [],
  			false
  		).length;
  	}
  });
  
  });
  