Online PHP editor | rfc for kZmnT

@ 2014-02-27T11:44:44Z

<?php
function reindexArray($array, $column)
{
   return array_combine(
                array_map(function($x) use ($column)
                {
                   return $x[$column];
                }, $array),
                $array
   );
}

function arrayJoin($array1, $array2, $column, $default=null)
{
   //in PHP 5.5 it's just array_column() call:
   $array1 = reindexArray($array1, $column);
   $array2 = reindexArray($array2, $column);
   $blank1 = array_combine(
                array_keys(current($array1)), 
                array_fill(1, count(current($array1)), $default)
   );
   $blank2 = array_combine(
                array_keys(current($array2)), 
                array_fill(1, count(current($array2)), $default)
   );
   unset($blank1[$column], $blank2[$column]);

   return array_merge(
             array_map(function($x) use ($array1, $blank2)
             {
                return array_merge($array1[$x], $blank2);
             }, array_keys(array_diff_key($array1, $array2))),
             array_map(function($x) use ($array1, $array2)
             {
                return array_merge($array1[$x], $array2[$x]);
             }, array_keys(array_intersect_key($array1, $array2))),
             array_map(function($x) use ($array2, $blank1)
             {
                return array_merge($array2[$x], $blank1);
             }, array_keys(array_diff_key($array2, $array1)))
   );
}

$array1 = array();

$array1[]=array('subscribers'=>2,'dt_date'=>'2014-02-27');
$array1[]=array('subscribers'=>2,'dt_date'=>'2014-02-25');
$array1[]=array('subscribers'=>1,'dt_date'=>'2014-02-07');

$array2 = array();
$array2[]=array('unsubscribers'=>1,'dt_date'=>'2014-02-27');
$array2[]=array('unsubscribers'=>1,'dt_date'=>'2014-02-01');


var_dump(arrayJoin($array1, $array2, 'dt_date'));

Output for git.master, git.master_jit, rfc.property-hooks: array(4) { [0]=> array(3) { ["subscribers"]=> int(2) ["dt_date"]=> string(10) "2014-02-25" ["unsubscribers"]=> NULL } [1]=> array(3) { ["subscribers"]=> int(1) ["dt_date"]=> string(10) "2014-02-07" ["unsubscribers"]=> NULL } [2]=> array(3) { ["subscribers"]=> int(2) ["dt_date"]=> string(10) "2014-02-27" ["unsubscribers"]=> int(1) } [3]=> array(3) { ["unsubscribers"]=> int(1) ["dt_date"]=> string(10) "2014-02-01" ["subscribers"]=> NULL } }

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