for example, if you want to get AB, AC, BA, BC, CA, and CB.
but the number of ABC varies, ask the algorithm expert, how to write a function to get the array of all cases?
for example, if you want to get AB, AC, BA, BC, CA, and CB.
but the number of ABC varies, ask the algorithm expert, how to write a function to get the array of all cases?
No code is only available for other An2 models to write a general
.function An2(array $arr)
{
$out = [];
for ($i = 0; $i < count($arr) - 1; $i PP) {
for ($j = $i + 1; $j < count($arr); $jPP) {
$out[] = [$arr[$i], $arr[$j]];
$out[] = [$arr[$j], $arr[$i]];
}
}
return $out;
}
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