function splitBy($string, $separator = ' ', $limit = null)
{
expectsAll(string, [$string, $separator]);
expectsOptional(int, $string);
return explode($separator, $string, $limit);
}
/**
* Flattens multidimensional list
*
* @param array|\Traversable $sequence
* @param int|null $depth
* @return array
*/
function flatten($sequence, $depth = null)
{
args\expects(args\traversable, $sequence);
args\expectsOptional(args\int, $depth);
if (null === $depth) {
$result = array();
array_walk_recursive(ds\traversableToArray($sequence), function ($item, $key) use(&$result) {
if ($item instanceof \Traversable) {
$result = array_merge($result, flatten(ds\traversableToArray($item)));
} else {
$result[] = $item;
}
});
return $result;
}
$result = array();
foreach ($sequence as $value) {
if ($depth && (is_array($value) || $value instanceof \Traversable)) {
foreach ($depth > 1 ? flatten($value, $depth - 1) : $value as $subValue) {
$result[] = $subValue;
}
} else {
$result[] = $value;
}
}
return $result;
}
function expectsOptionalIntNegativeTest($arg1)
{
expectsOptional([int], $arg1);
}