| 298 | |
| 299 | // Implement the identical functionality for filter and not |
| 300 | function winnow( elements, qualifier, keep ) { |
| 301 | |
| 302 | // Can't pass null or undefined to indexOf in Firefox 4 |
| 303 | // Set to 0 to skip string check |
| 304 | qualifier = qualifier || 0; |
| 305 | |
| 306 | if ( jQuery.isFunction( qualifier ) ) { |
| 307 | return jQuery.grep(elements, function( elem, i ) { |
| 308 | var retVal = !!qualifier.call( elem, i, elem ); |
| 309 | return retVal === keep; |
| 310 | }); |
| 311 | |
| 312 | } else if ( qualifier.nodeType ) { |
| 313 | return jQuery.grep(elements, function( elem, i ) { |
| 314 | return (elem === qualifier) === keep; |
| 315 | }); |
| 316 | |
| 317 | } else if ( typeof qualifier === "string" ) { |
| 318 | var filtered = jQuery.grep(elements, function( elem ) { |
| 319 | return elem.nodeType === 1; |
| 320 | }); |
| 321 | |
| 322 | if ( isSimple.test( qualifier ) ) { |
| 323 | return jQuery.filter(qualifier, filtered, !keep); |
| 324 | } else { |
| 325 | qualifier = jQuery.filter( qualifier, filtered ); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | return jQuery.grep(elements, function( elem, i ) { |
| 330 | return (jQuery.inArray( elem, qualifier ) >= 0) === keep; |
| 331 | }); |
| 332 | } |
| 333 | |
| 334 | })( jQuery ); |