访问 powershell 哈希表中每个键的值

Question

我正在研究在 powershell 中使用哈希表作为查找表的项目。

在其最简单的形式中，它类似于下面的示例。

示例 1

$hashTable = @{
    Key1 = 'Value1'
    Key2 = 'Value2'
}

foreach($key in $hashTable.Keys)
{
    $value = $hashTable.$key
    Write-Output "$key : $value"
}

示例 2

$ageList = @{}
$key = 'Kevin'
$value = 36
$ageList.add( $key, $value )
$ageList.add( 'Alex', 9 )



foreach($key in $ageList.keys)
{
    $message = '{0} is {1} years old' -f $key, $ageList[$key]
    Write-Output $message
}

我定义了一个类似于下面的多键哈希，与上面的示例相比，它稍微复杂一些。

$x = (1,"Server1",3,1),(4,"Server2",6,2),(3,"Server3",4,3)
$k = 'serverid','servername','locationid','appid'    # key names correspond to data positions in each array in $x
$h = @{}
  
  
For($i=0;$i -lt $x[0].length; $i++){
    $x |
        ForEach-Object{
            [array]$h.($k[$i]) += [string]$_[$i]
        }
           
           
} 

 $all_server_ids = $h['Serverid']


foreach ($server_id in $all_server_ids)
{
   $message = 'ServerID {0} has a servername of  {1}' -f $server_id, $h[$server_id]
    write-output $message

}

根据我的阅读，我知道我可以使用 serverid 作为访问其他值的键。 当我运行上述内容时，我得到的是这个。

ServerID 1 has a servername of  
ServerID 4 has a servername of  
ServerID 3 has a servername of  

在进一步研究中，我尝试使用 GetEnumerator，如下例所示。这不是我想要达到的目标。

 $h.GetEnumerator() | % { $_.Value }

我想使用 foreach 的原因是，稍后我可以在循环运行时添加并行工作流来加快处理速度。我希望这种方法没有问题。

我也对创建自定义对象的想法持开放态度，如果这可行的话，它需要能够像下面这样将数组传递给它以创建自定义对象并使用 foreach 循环遍历每个项目。

$x = (1,"Server1",3,1),(4,"Server2",6,2),(3,"Server3",4,3)

Answer 1

感谢@AdminOfThings

这是问题的解决方案。

 $x = (1,"Server1",3,1),(4,"Server2",6,2),(3,"Server3",4,3)
$k = 'serverid','servername','locationid','appid'    # key names correspond to data positions in each array in $x
$h = @{}
  
  
For($i=0;$i -lt $x[0].length; $i++){
    $x |
        ForEach-Object{
            [array]$h.($k[$i]) += [string]$_[$i]
        }
           
           
} 


 $all_server_ids = $h['Serverid']

foreach ($server_id in $all_server_ids)
{
    $severid = $h["serverid"][$all_server_ids.indexof($server_id)]
    $servername =  $h["servername"][$all_server_ids.indexof($server_id)]
    $locationid =  $h["locationid"][$all_server_ids.indexof($server_id)]

    $message = 'ServerID {0} has a servername of  {1} and a location id of {2}'  -f $server_id, $h["servername"][$all_server_ids.indexof($server_id)],$h["locationid"][$all_server_ids.indexof($server_id)]
    Write-Output $message
    Write-Output "This $severid and this $servername and this $locationid"

}

现在可以按命名访问键和值。

Answer 2

其他可能性1：

 #create your data
 $Datas = (1,"Server1",3,1),(4,"Server2",6,2),(3,"Server3",4,3)

 #create your objects
 $Objects= $Datas  | %{

     $Items=$_ -split ','

     [pscustomobject]@{
     serverid= $Items[0]
     servername= $Items[1]
     locationid= $Items[2]
     appid= $Items[3]
                    }
}

#use your objects
 $Objects| %{
'ServerID {0} has a servername of  {1} and a location id of {2}'  -f $_.serverid, $_.servername,$_.locationid
"This {0} and this {1} and this {2}" -f $_.serverid, $_.servername,$_.locationid
}

Answer 3

其他可能性，有类（对我来说更优雅）

class ServerApp
 {
     [int] $serverid
     [string] $servername
     [int] $locationid
     [int] $appid

     ServerApp([int] $Pserverid, [string] $Pservername, [int] $Plocationid, [int] $Pappid ) {
     $this.serverid=$Pserverid
     $this.servername=$Pservername
     $this.locationid=$Plocationid
     $this.appid=$Pappid
    }
 }

 #create your data
 $Objects=@()
 $Objects+=[ServerApp]::new(1,"Server1",3,1)
 $Objects+=[ServerApp]::new(4,"Server2",6,2)
 $Objects+=[ServerApp]::new(3,"Server3",4,3)

#use your objects
 $Objects| %{
'ServerID {0} has a servername of  {1} and a location id of {2}'  -f $_.serverid, $_.servername,$_.locationid
"This {0} and this {1} and this {2}" -f $_.serverid, $_.servername,$_.locationid
}