/**
* Splits categories into two equal parts
*
* @return array
*/
static function splitInHalf()
{
$categoryWeight = 4;
$all = self::visible()->get();
$totalVisibleSkills = Skill::visible()->count() + count($all) * $categoryWeight;
$splitted = [[], []];
$currentSkillsCount = 0;
$currentArray =& $splitted[0];
foreach ($all as $category) {
$skills = $category->visibleSkills()->count() + $categoryWeight;
array_push($currentArray, $category);
$currentSkillsCount += $skills;
if ($currentSkillsCount > $totalVisibleSkills / 2 && empty($splitted[1])) {
$currentArray =& $splitted[1];
}
}
return $splitted;
}