php - php中的循环算法等于主场分布

Question

我一直在寻找这个解决方案，但文档很少，但无法正确获取。请看一看。我尝试实现循环算法来创建比赛时间表，但堆叠在主客场分布上。

$allTeam=[3,10,8,7];
$leng=sizeof($allTeam);
$lastHalf=$leng-1;
for ($t=0; $t <$leng-1 ; $t++) { 
        for ($i=0; $i < $leng/2; $i++) { 
            if($t % 2== 0){
                \Log::info('Home Team => '.$allTeam[$i].' vs '.  $allTeam[$lastHalf-$i].'<=Away Team');
            }else{
                \Log::info('Away Team =>'.$allTeam[$i].' vs '.  $allTeam[$lastHalf-$i].'<= Home Team');
            }

        }

       /*now rotate the array. For this first insert the last item into postion 1*/
        array_splice( $allTeam, 1, 0, $allTeam[$leng-1]);
        /*now pop up the last element*/
        array_pop($allTeam);
 }

这是结果

Home Team => 3 vs 7<=Away Team  
Home Team => 10 vs 8<=Away Team  

Away Team =>3 vs 8<= Home Team  
Away Team =>7 vs 10<= Home Team  

Home Team => 3 vs 10<=Away Team  
Home Team => 8 vs 7<=Away Team  

您可以看到它分布不均。我如何确定如果一支球队在第一轮作为主队比赛，那么这支球队应该在下一轮比赛中客场比赛？同样，如果第一轮客场然后下一轮回家？

谢谢。

Answer 1

这比你现在做的更容易，如果你只创建每个排列，那么每支球队将在球队之间进行主客场比赛的次数相等，所以如果有 4 支球队，你将有 3 主场 3 客场，生成会像这样完成:

<?php
$allTeam = [3, 10, 8, 7];

$result = [];
foreach ($allTeam as $home) {
    foreach ($allTeam as $away) {
        if ($home === $away) {
           continue;
        }
        $result[] = 'Home Team => '.$home.' vs '.$away.' <= Away Team';
    } 
}

print_r($result);

https://3v4l.org/EAl8G

结果:

Array
(
    [0] => Home Team => 3 vs 10 <= Away Team
    [1] => Home Team => 3 vs 8 <= Away Team
    [2] => Home Team => 3 vs 7 <= Away Team
    [3] => Home Team => 10 vs 3 <= Away Team
    [4] => Home Team => 10 vs 8 <= Away Team
    [5] => Home Team => 10 vs 7 <= Away Team
    [6] => Home Team => 8 vs 3 <= Away Team
    [7] => Home Team => 8 vs 10 <= Away Team
    [8] => Home Team => 8 vs 7 <= Away Team
    [9] => Home Team => 7 vs 3 <= Away Team
    [10] => Home Team => 7 vs 10 <= Away Team
    [11] => Home Team => 7 vs 8 <= Away Team
)

然后您将有另一个循环，以某种方式对它们进行排序，使其看起来像 home -> away -> home -> away 场景。