public function testArrayTranspose()
{
$array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));
$array = array_transpose($array);
$this->assertEquals($array, array(array(1, 4, 7), array(2, 5, 8), array(3, 6, 9)));
//
$array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9, 'key' => 'value'));
$array = array_transpose($array);
$this->assertEquals($array, array(array(1, 4, 7), array(2, 5, 8), array(3, 6, 9), 'key' => array(2 => 'value')));
}
/** function array_shrink [arrayShrink]
* Returns all elements with second level key $key
* from a 2-D array
* e.g.-
* $array[0]['foo'] = 'bar';
* $array[1]['foo'] = 'baz';
*
* array_shrink($array, 'foo') returns
* array(
* [0] = 'bar'
* [1] = 'baz'
* )
*
* This function returns the input if it is not
* an array, or returns false if the key is not
* present in the array
*
* @param array data array
* @param mixed second level key
* @return mixed array (or original input or bool false on failure)
*/
function array_shrink($array, $key)
{
if (!is_array($array)) {
return $array;
}
$array = array_transpose($array);
if (!isset($array[$key])) {
return false;
}
return $array[$key];
}
