<?php
namespace itertools;
function filter(\Traversable $iterator, callable $callback = null)
{
foreach ($iterator as $key => $val) {
if (null !== $callback and $callback($val, $key)) {
(yield $key => $val);
} else if ($val) {
(yield $key => $val);
}
}
}
$a = new \ArrayObject(["foo", "bar", 0, "baz"]);
foreach (filter($a) as $val) {
print_r($val);
}
- Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- foobarbaz
- Output for 5.4.0 - 5.4.45
- Parse error: syntax error, unexpected '$key' (T_VARIABLE) in /in/IpXud on line 9
Process exited with code 255. - Output for 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected T_VARIABLE in /in/IpXud on line 9
Process exited with code 255. - Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
- Parse error: syntax error, unexpected T_STRING in /in/IpXud on line 3
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_STRING in /in/IpXud on line 3
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/IpXud on line 3
Process exited with code 255.
preferences:
332.54 ms | 401 KiB | 460 Q