function testCycle()
{
$colors = new \ArrayIterator(["A", "B", "C", "D"]);
$it = itertools\slice(itertools\cycle($colors), 0, 10);
$list = [];
foreach ($it as $val) {
$list[] = $val;
}
$this->assertEquals(["A", "B", "C", "D", "A", "B", "C", "D", "A", "B"], $list);
}
/**
* Return multi dimensional array for $n most common elements and their
* counts from the most to the least. If $n is null, then it return all
* element counts.
*
* @param int $n
* @return array
*/
public function mostCommon($n = null)
{
$list = sort_by($this->items(), function ($elem) {
return -$elem[1];
});
if ($n !== null) {
return iterator_to_array(slice($list, 0, $n));
}
return $list;
}
function slice($offset, $count = -1)
{
$this->iterator = itertools\slice($this->iterator, $offset, $count);
return $this;
}
