Question

我有一个如下所示的数组列表，

Array(
    [1] => Array
    (
        [id] => 18
        [name] => mac
        [country_code] => +91
        [phone] => 1325647890
        [distance] => 15 m
        [address] => sdfghjk
        [city] => Place_1
        [state] => Kerala
        [postal_code] => 682030
    )   
    [2] => Array
    (
        [id] => 18
        [name] => Paul
        [country_code] => +91
        [phone] => 1325647890
        [distance] => 32.1 m
        [address] => sdfghjk
        [city] => Place_1
        [state] => Kerala
        [postal_code] => 686610
    )
    [3] => Array
    (
        [id] => 18
        [name] => John
        [country_code] => +91
        [phone] => 1325647890
        [distance] => 3 m
        [address] => sdfghjk
        [city] => Place_1
        [state] => Kerala
        [postal_code] => 682030
    )
)

我需要使用minimum value of [distance]

从上面的列表中选择单个数组

即，所需的输出将是，

[3] => Array
(
    [id] => 40
    [name] => John
    [country_code] => +91
    [phone] => 1234567809
    [distance] => 3 m
    [address] => bddf
    [city] => Place_3
    [state] => Kerala
    [postal_code] => 682030
)

Answer 1

您可以尝试这样：

您需要将所有距离转换为相同的单位，然后才能找到最小距离。

$serverName = "domserverqa";
$databases = (Get-AzureRmSqlDatabase -ResourceGroupName $resourceGroup -ServerName $serverName).DatabaseName
$Backupdatatime = "Standard time of the backup for all databases" # E.g. "2018-01-09-07:00"
foreach($database in $databases)
{
    $primarykey = $STORAGE_ACCOUNT_BACKUP_KEY; #strdatabasebackup
    # Assuming strdatabase as a standard name given to the storage accounts and other databases follow the naming conventions.
    $StorageUri = "https://" + $database + "backup" + ".blob.core.windows.net/" + $database + "backupblob" + "/" + "(" + $Backupdatatime + ")" + $databases + ".bacpac"

    #Further actions.....
}

Answer 2

一个简单的array_reduce会为你处理这个问题，你需要将距离字符串转换为相同的基数（km - ＆gt; m），转换为数字也可以更好地进行比较：

$source = [
    [
        'id' => 18,
        'name' => 'Mac',
        'distance' => '15 m'
        // ...
    ],
    [
        'id' => 27,
        'name' => 'paul',
        'distance' => '32.1 km'
        // ...
    ],
    [
        'id' => 40,
        'name' => 'John',
        'distance' => '3 m'
        // ...
    ]
];

function convertDistanceToMeter($from) {
    list($value, $unit) = explode(' ', $from);
    switch($unit) {
        case 'm': return $value * 1;
        case 'km': return $value * 1000;
        default: throw new Exception("Unit '$unit' not supportet.");
    }
}

$result = array_reduce($source, function($carry, $item) {
    if(!$carry) return $item;
    $itemDst = convertDistanceToMeter($item["distance"]);
    $carryDst = convertDistanceToMeter($carry["distance"]);
    return $itemDst < $carryDst ? $item : $carry;
});

print_r($result);

输出符合预期：

Array
(
    [id] => 40
    [name] => John
    [distance] => 3 m
    // ...
)

Answer 3

=＆GT;检查这个网址..

Find min/max in a two dimensional array

OR

https://reformatcode.com/code/php/how-to-get-the-highest-and-lowest-values-and-sum-from-multidimensional-array-in-php

从php中的数组列表中选择具有最小值的单个数组

3 个答案: