php - 在分组时按数字键和列值求和合并深层行组

Question

我有以下数组，需要通过求和内部值来减少它。

输入:

$array = [
    [
        121 => [ "number" => 121, "name" => "Some Name 1", "value" => "2.222" ],
        116 => [ "number" => 116, "name" => "Some Name 2", "value" => "1.111" ],
          1 => [ "number" =>   1, "name" => "Some Name 3", "value" => "1.232" ]
    ],
    [
        121 => [ "number" => 121, "name" => "Some Name 1", "value" => "1.111" ],
        116 => [ "number" => 116, "name" => "Some Name 2", "value" => "2.222" ],
          1 => [ "number" =>   1, "name" => "Some Name 3", "value" => "3.111" ]
    ]
];

期望的结果:

0 => array:116 [
  121 => array:3 [
    "number" => 121
    "name" => "Some Name 1"
    "value" => "3.333"
  ] 
  116 => array:3 [
    "number" => 116
    "name" => "Some Name 2"
    "value" => "3.333"
  ]
  1 => array:3 [
    "number" => 1
    "name" => "Some Name 3"
    "value" => "4.343"
  ]
]

假设输入数组的长度未定义，但复杂度/嵌套级别最大为 2，那么根据输入计算结果数组的高效/有效方法是什么。

我正在寻找针对 PHP5.6 和 PHP7+ 的性能优化解决方案。

Answer 1

使用嵌套循环访问深层子数组。当您迭代时，将首先遇到的行插入结果数组，同时保留它们的数字/关联键。使用这些键来确定(在循环时)以确定之前是否遇到过一行——如果遇到过，只需将 value 值添加到缓存的行。

代码:(Demo)

$result = [];
foreach ($array as $group) {
    foreach ($group as $key => $row) {
        if (!isset($result[$key])) {
            $result[$key] = $row;
        } else {
            $result[$key]['value'] += $row['value'];
        }
    }
}
var_export($result);