取两个独立数组的一部分并将它们组合成一个答案

【问题标题】：Take parts of two separate arrays and combine them into one取两个独立数组的一部分并将它们组合成一个
【发布时间】：2018-07-01 22:16:31
【问题描述】：

我有两个数组。它们中的每一个都由“日期”和“关闭”键组成。

例子：

Array1 - Date: 12-Jun-18, Close: "55.6"
Array2 - Date: 12-Jun-18, Close: "1.26"

$stock_one_prices = sw::shared()->prices->getForStockID($id);
$stock_one_prices_array = array();

foreach ($stock_one_prices as $stock_one_price) {
    $stock_one_prices_array [] = [
        "date" => $stock_one_price['date'],
       "close" => $stock_one_price['close']
    ];
}

$stock_two_prices = sw::shared()->prices->getForStockID($idtwo);
$stock_two_prices_array = array();

foreach ($stock_two_prices as $stock_two_price) {
    $stock_two_prices_array [] = [
        "date" => $stock_two_price['date'],
        "close" => $stock_two_price['close']
    ];
}

我想将这两个数组合并为一个，匹配记录的日期以生成一个日期，然后从每个数组中取出关闭值并将它们用于新数组。

例子：

Array1 - Date: 12-Jun-18, Close: "55.6"
Array2 - Date: 12-Jun-18, Close: "1.26"

Array1 - Date: 13-Jun-18, Close: "58.6"
Array2 - Date: 13-Jun-18, Close: "2.37"

New Array
----------
Date: 12-Jun-18, CloseOne: "55.6", CloseTwo: "1.26"
Date: 13-Jun-18, CloseOne: "58.6", CloseTwo: "2.37"

我怎样才能做到这一点？

【问题讨论】：

标签： php arrays multidimensional-array

【解决方案1】：

我见过一种使用date 作为数组键的常见模式。这将为您的数据集设置一个通用索引，以便您可以按组进行分配。

演示：https://3v4l.org/jRQo0

$array1 = [
    [
        'date' => '12-Jun-18',
        'close' => 55.6,
    ],
    [
        'date' => '13-Jun-18',
        'close' => 58.6,
    ],
];

$array2 = [
    [
        'date' => '12-Jun-18',
        'close' => 1.26,
    ],
    [
        'date' => '13-Jun-18',
        'close' => 2.37,
    ],
];

$all = array_merge($array1, $array2);

foreach ($all as $datapoint) {
    $result[$datapoint['date']] []= $datapoint['close'];
}

print_r($result);

[12-Jun-18] => Array
    (
        [0] => 55.6
        [1] => 1.26
    )

[13-Jun-18] => Array
    (
        [0] => 58.6
        [1] => 2.37
    )

【讨论】：