laravel PHP：如何将数组分成两部分？

PHP: How to split array into 2 parts?

提问by KriiV

I have an array full of DB records. It could heaps of elements or very little, it changes regularly.

我有一个充满数据库记录的数组。它可能有很多元素，也可能很少，它会定期变化。

I need to split the array into two equal parts. The reason is I am then passing these arrays to a Laravel view and displaying them into separate columns.

我需要将数组分成两个相等的部分。原因是我然后将这些数组传递给 Laravel 视图并将它们显示到单独的列中。

Here is the DB records being pulled:

这是正在提取的数据库记录：

$books = Book::where('unitcode', '=', $unitcode['unitcode'])->get();

$books = Book::where('unitcode', '=', $unitcode['unitcode'])->get();

If the pull works then I'm running this:

如果拉动工作，那么我正在运行这个：

return View::make('showbooks')
->with('books', $books);

What I want to do is pass $books1and $books2which is actually $bookssplit into 2 parts.

我想做的是通过$books1，$books2实际上$books分为两部分。

Any ideas on how I could do this? Thanks

关于我如何做到这一点的任何想法？谢谢

回答by Ohgodwhy

This is a one liner:

这是一个单班轮：

$halved = array_chunk($books, ceil(count($books)/2));

Then $halved[0]will contain the first half of the array. It will always be 1 element larger in the event that the array contains an odd number of elements. Of course, $halved[1]will contain the 2nd half of the array.

然后$halved[0]将包含数组的前半部分。如果数组包含奇数个元素，它将始终大 1 个元素。当然，$halved[1]将包含数组的第二部分。

Here's a working example

这是一个工作示例

回答by Mad Angle

I think this will work for you.

我认为这对你有用。

<?php
    $books = array("a", "b", "c", "d", "e","f"); // assuming books is an array like this
    $count = count($books); // total count of the array books
    $half = $count/2; // half of the total count
    $books1 = array_slice($books, 0, $half);      // returns first half
    $books2 = array_slice($books, $half);  // returns second half

    print_r($books1);
    print_r($books2);
?>

回答by Abdes sabor

I think you should take the length of the array using the count method and then loop the items till the middle it should look like this :

我认为你应该使用 count 方法获取数组的长度，然后循环项目直到中间它应该是这样的：

<?php 
    $count = count($books);            //getting the count of $books
    $mid = round($count/2);           //getting the mid point of $books
    for($i = 0; $i < $count ; $i++){ //looping through the indexes
        if($i <= mid - 1){          //Checking the position of $i and adding the value
            $books1[] = $books[$i];
        }else{
            $books2[] = $books[$i];
        }
    }
?>

回答by Jerre

To expand on Ohgodwhy's answer:

扩展Ohgodwhy的回答：

Since you're using laravel, here's a more fluent way to achieve this:

由于您使用的是laravel，这里有一种更流畅的方法来实现这一点：

$books = collect($books);

$halved = $books->split(ceil($books->count()/2))->toArray();

// Result: [[a, b, c], [d, e, f]]

Take a look at Laravel's various Collection Methodsfor more available methods to fluently manipulate arrays.

查看 Laravel 的各种Collection Methods以获取更多可用的方法来流畅地操作数组。

回答by Hans Zhang

Use:

用：

$collection->chunk(2);

See: https://laravel.com/docs/5.6/collections#method-chunk

请参阅：https: //laravel.com/docs/5.6/collections#method-chunk