问个二位数组操作问题
$aa=array("id"=>"1","time"=>"5","neirong"=>"www");
$aa=array("id"=>"2","time"=>"55","neirong"=>"www");
$aa=array("id"=>"4","time"=>"555","neirong"=>"www");
$aa=array("id"=>"5","time"=>"555","neirong"=>"www");
$aaa=array("duibi"=>$aa);
$bb=array("id"=>"1","time"=>"5");
$bb=array("id"=>"2","time"=>"50");
$bb=array("id"=>"3","time"=>"555");
$bbb=array("duibi"=>$bb);
$aaa和$bbb对比操作
变成
$cc=array("id"=>"2","time"=>"55","neirong"=>"www");
$cc=array("id"=>"3","neirong"=>"delete");
$cc=array("id"=>"4","time"=>"555","neirong"=>"www");
$cc=array("id"=>"5","time"=>"555","neirong"=>"www");
怎么写
先说明下
$aa=array("id"=>"1","time"=>"5","neirong"=>"www");这个数据之所已没有是因为 $aa和$bb时间是一样的
$aa=array("id"=>"2","time"=>"55","neirong"=>"www");
$bb=array("id"=>"2","time"=>"50");
那是因为bbdetime比aa得time小所以。。
$cc=array("id"=>"3","neirong"=>"delete");对应的$aa不存在所以。。
$cc=array("id"=>"4","time"=>"555","neirong"=>"www");
$cc=array("id"=>"5","time"=>"555","neirong"=>"www");
因为$bb没有对应的id 4和5的数据。。所以
------解决方案--------------------
$aa = array(<br /> array("id"=>"1","time"=>"5","neirong"=>"www"),<br /> array("id"=>"2","time"=>"55","neirong"=>"www"),<br /> array("id"=>"4","time"=>"555","neirong"=>"www"),<br /> array("id"=>"5","time"=>"555","neirong"=>"www"),<br />);<br /><br />$bb = array(<br /> array("id"=>"1","time"=>"5"),<br /> array("id"=>"2","time"=>"50"),<br /> array("id"=>"3","time"=>"555"),<br />);<br /><br />foreach($aa as $v) $r[$v['id']] = $v;<br />foreach($bb as $v) {<br /> $k = $v['id'];<br /> if(! isset($r[$k])) $r[$k] = $v;<br /> elseif($r[$k]['time'] < $v['time']) $r[$k] = $v;<br /> elseif($r[$k]['time'] == $v['time']) unset($r[$k]);<br />}<br />ksort($r);<br />print_r($r);Array<br />(<br /> [2] => Array<br /> (<br /> [id] => 2<br /> [time] => 55<br /> [neirong] => www<br /> )<br /><br /> [3] => Array<br /> (<br /> [id] => 3<br /> [time] => 555<br /> )<br /><br /> [4] => Array<br /> (<br /> [id] => 4<br /> [time] => 555<br /> [neirong] => www<br /> )<br /><br /> [5] => Array<br /> (<br /> [id] => 5<br /> [time] => 555<br /> [neirong] => www<br /> )<br /><br />)<br /><br />
