i have 2 simple arrays. 1 array of posts ($posts) , other array of post id's should on top of stream, featured ($featured). trying find efficient way loop through them , if id in both arrays, move beginning of $posts array, , ones moved should sorted asc $featured['order'], example, posts ($posts):
array ( [ab77] => status_update object ( [id] => ab77 [title] => status update ) [b4k7] => status_update object ( [id] => b4k7 [title] => status update ) [4d55] => status_update object ( [id] => 4d55 [title] => status update ) [13c5] => status_update object ( [id] => 13c5 [title] => status update ) [3aa2] => status_update object ( [id] => 3aa2 [title] => status update ) ) and posts should featured ($featured):
array ( [13c5] => array ( [id] => 13c5 [order] => 1 ) [3a71] => array ( [id] => 3a71 [order] => 2 ) [4d55] => array ( [id] => 4d55 [order] => 3 ) ) so $posts array should end sorted this:
13c5 4d55 ab77 bk47 3aa2
how do without bunch of slow loops?
this should doable uksort() , closures:
uksort( $posts, function ( $a, $b ) use ( $featured ) { $fa = ( isset( $featured[$a] ) ? $featured[$a]['order'] : inf ); $fb = ( isset( $featured[$b] ) ? $featured[$b]['order'] : inf ); if ( $fa != $fb ) return ( $fa < $fb ? -1 : +1 ); // add tie-breaker comparison here return 0; } ); 