<?php
function powerSet($in,$minLength = 1) {
$count = count($in);
$members = pow(2,$count);
$return = array();
for ($i = 0; $i < $members; $i++) {
$b = sprintf("%0".$count."b",$i);
$out = array();
for ($j = 0; $j < $count; $j++) {
if ($b{$j} == '1') $out[] = $in[$j];
}
if (count($out) >= $minLength) {
$return[] = $out;
}
}
return $return;
}
$x = powerSet(array(1,2,3,4,5));
var_dump($x);
- Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Fatal error: Array and string offset access syntax with curly braces is no longer supported in /in/9Z2Me on line 11
Process exited with code 255. - Output for 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
- Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/9Z2Me on line 11
array(31) {
[0]=>
array(1) {
[0]=>
int(5)
}
[1]=>
array(1) {
[0]=>
int(4)
}
[2]=>
array(2) {
[0]=>
int(4)
[1]=>
int(5)
}
[3]=>
array(1) {
[0]=>
int(3)
}
[4]=>
array(2) {
[0]=>
int(3)
[1]=>
int(5)
}
[5]=>
array(2) {
[0]=>
int(3)
[1]=>
int(4)
}
[6]=>
array(3) {
[0]=>
int(3)
[1]=>
int(4)
[2]=>
int(5)
}
[7]=>
array(1) {
[0]=>
int(2)
}
[8]=>
array(2) {
[0]=>
int(2)
[1]=>
int(5)
}
[9]=>
array(2) {
[0]=>
int(2)
[1]=>
int(4)
}
[10]=>
array(3) {
[0]=>
int(2)
[1]=>
int(4)
[2]=>
int(5)
}
[11]=>
array(2) {
[0]=>
int(2)
[1]=>
int(3)
}
[12]=>
array(3) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(5)
}
[13]=>
array(3) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(4)
}
[14]=>
array(4) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(4)
[3]=>
int(5)
}
[15]=>
array(1) {
[0]=>
int(1)
}
[16]=>
array(2) {
[0]=>
int(1)
[1]=>
int(5)
}
[17]=>
array(2) {
[0]=>
int(1)
[1]=>
int(4)
}
[18]=>
array(3) {
[0]=>
int(1)
[1]=>
int(4)
[2]=>
int(5)
}
[19]=>
array(2) {
[0]=>
int(1)
[1]=>
int(3)
}
[20]=>
array(3) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(5)
}
[21]=>
array(3) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(4)
}
[22]=>
array(4) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(4)
[3]=>
int(5)
}
[23]=>
array(2) {
[0]=>
int(1)
[1]=>
int(2)
}
[24]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(5)
}
[25]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
}
[26]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
[3]=>
int(5)
}
[27]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
}
[28]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(5)
}
[29]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
}
[30]=>
array(5) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
}
}
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.26
- array(31) {
[0]=>
array(1) {
[0]=>
int(5)
}
[1]=>
array(1) {
[0]=>
int(4)
}
[2]=>
array(2) {
[0]=>
int(4)
[1]=>
int(5)
}
[3]=>
array(1) {
[0]=>
int(3)
}
[4]=>
array(2) {
[0]=>
int(3)
[1]=>
int(5)
}
[5]=>
array(2) {
[0]=>
int(3)
[1]=>
int(4)
}
[6]=>
array(3) {
[0]=>
int(3)
[1]=>
int(4)
[2]=>
int(5)
}
[7]=>
array(1) {
[0]=>
int(2)
}
[8]=>
array(2) {
[0]=>
int(2)
[1]=>
int(5)
}
[9]=>
array(2) {
[0]=>
int(2)
[1]=>
int(4)
}
[10]=>
array(3) {
[0]=>
int(2)
[1]=>
int(4)
[2]=>
int(5)
}
[11]=>
array(2) {
[0]=>
int(2)
[1]=>
int(3)
}
[12]=>
array(3) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(5)
}
[13]=>
array(3) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(4)
}
[14]=>
array(4) {
[0]=>
int(2)
[1]=>
int(3)
[2]=>
int(4)
[3]=>
int(5)
}
[15]=>
array(1) {
[0]=>
int(1)
}
[16]=>
array(2) {
[0]=>
int(1)
[1]=>
int(5)
}
[17]=>
array(2) {
[0]=>
int(1)
[1]=>
int(4)
}
[18]=>
array(3) {
[0]=>
int(1)
[1]=>
int(4)
[2]=>
int(5)
}
[19]=>
array(2) {
[0]=>
int(1)
[1]=>
int(3)
}
[20]=>
array(3) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(5)
}
[21]=>
array(3) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(4)
}
[22]=>
array(4) {
[0]=>
int(1)
[1]=>
int(3)
[2]=>
int(4)
[3]=>
int(5)
}
[23]=>
array(2) {
[0]=>
int(1)
[1]=>
int(2)
}
[24]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(5)
}
[25]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
}
[26]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(4)
[3]=>
int(5)
}
[27]=>
array(3) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
}
[28]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(5)
}
[29]=>
array(4) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
}
[30]=>
array(5) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
}
}
preferences:
237.94 ms | 412 KiB | 341 Q