public function testArrayInterleave()
{
$this->assertEquals([], Arrays::interleave('x', []));
$this->assertEquals(['y'], Arrays::interleave('x', ['y']));
$this->assertEquals(['y', 'x', 'z'], Arrays::interleave('x', ['y', 'z']));
$this->assertEquals(['y', 'x', 'z'], Arrays::interleave('x', ['kangaroo' => 'y', 'marmoset' => 'z']));
$obj1 = (object) [];
$obj2 = (object) [];
$this->assertEquals([$obj1, $obj2, $obj1, $obj2, $obj1], Arrays::interleave($obj2, [$obj1, $obj1, $obj1]));
$implode_tests = ['' => [1, 2, 3], 'x' => [1, 2, 3], 'y' => [], 'z' => [1]];
foreach ($implode_tests as $x => $y) {
$this->assertEquals(implode('', Arrays::interleave($x, $y)), implode($x, $y));
}
}
/**
* Add an element between every two elements of some array. That is, given a
* list `A, B, C, D`, and some element to interleave, `x`, this function returns
* `A, x, B, x, C, x, D`. This works like `implode()`, but does not concatenate
* the list into a string. In particular:
*
* implode('', array_interleave($x, $list));
*
* ...is equivalent to:
*
* implode($x, $list);
*
* One case where this is useful is in rendering lists of HTML elements
* separated by some character, like a middle dot:
*
* phutil_tag(
* 'div',
* array(),
* array_interleave(" \xC2\xB7 ", $stuff));
*
* This function does not preserve keys.
*
* @param $interleave mixed Element to interleave.
* @param $array array List of elements to be interleaved.
*
* @return array Original list with the new element interleaved.
* @group util
*
* @deprecated
*/
function array_interleave($interleave, array $array)
{
return \Packaged\Helpers\Arrays::interleave($interleave, $array);
}
