Simple example of PHP linked list operation

The examples in this article describe PHP linked list operations. I share it with you for your reference, the details are as follows:

Running data structures in php is basically simulated with arrays, just using constant thinking.

The problem I encountered today is to merge two linked lists.

Rendering of linked list merging

Problem description: Linked list A is a template linked list, the length of linked list B is uncertain, and linked lists A and B are combined to form linked list C.

Let’s talk about programming ideas: A linked list is a template linked list, so after the operation is completed, the only length remains unchanged. The length of the B linked list is uncertain. Therefore, we can first judge the B linked list, which is divided into three steps:

Is the B linked list empty?
Is the B linked list shorter or equal to the A linked list?
Is the B linked list longer than the A linked list?

Programming is to list everything possible possibilities. Grab the variable. Due to the question requirement, when the A linked list and the B linked list are equal, the B linked list will be returned directly, so there is no need to consider this issue.

$node = array(
"nameid"=>"",
"shoolid"=>" ",
"depid"=>" ",
"start"=>" ",
"end"=>" "
);
/*
现在上面数据，有的数据存在A链表里面，有的存在B链表里面，如果都没有，用A链表的数据节点来代替。
开始第一次完成的时候，想了一个很蛋痛的方式，还用到arra_diff()函数用这个链表作差。后来仔细思考了一下。
*/
//$data 表示B链表
//$time 表示A链表
//这里为了节约资源，没开第三条链表，而是在B链表中操作,为什么要选一条不确定长度的链表
//看完你就知道为什么了
if(empty($data)) //
{
    //申请节点
    $data = array();
    foreach($time as $value)
    {
      //将A链表的数据进行需求处理，组成我们需要的节点模式
      $array = array("nameid"=>$value["id"],"depid"=>$depid,"schoolid"=>$schoolid,"start"=>"","end"=>"");
      array_push($data,$array); //将新节点压进栈
    }
}
else if(count($data)<=count($time)) //进行长度对比
{
   for($i=0;$i<count($time);$i++) //for循环，不建议在for循环继续动态判断，我这里是偷懒了。
   {
     if(empty($data[$i]))
     {
      //如果数据节点空，则构建节点
      $array = array("nameid"=>$time[$i]["id"],"depid"=>$depid,"schoolid"=>$schoolid,"start"=>"","end"=>"");
      array_push($data,$array);
     }
   }
}

The above algorithm is simply practiced, combining the data of A linked list and the data of B.

I hope this article will be helpful to everyone in PHP programming.

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