PHP版:
<BR>$o = array('x'=>1, 'y'=>2, 'z'=>3); <BR>$arr = array(); <BR>$i = 0; <BR>foreach( $o as $arr[$i++]=>$v )/*empty*/; <BR>var_dump($a<i>1本文来#源gaodai$ma#com搞$代*码*网</i><pre>搞代gaodaima码
rr); //$arr = array(‘x’, ‘y’, ‘z’);
JavaScrip版:
<BR>var o = {x:1, y:2, z:3}; <BR>var arr = [], i = 0; <BR>for ( arr[i++] in o ) /*empty*/ ; <BR>console.log( arr ); //arr = ['x', 'y', 'z']; <BR>