Powershell 的数据结构 Hashtable
简要说明, 无序哈希表是 pwsh 对 System.Collections.Hashtable 的包装, 无序哈希表是 pwsh 对 [https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.ordereddictionary) 的包装
文法结构
无序哈希表: @{ <name1> = <value1>; [<name2> = <value2> ] ...} 无序哈希表: [ordered]@{ <name1> = <value1>; [<name2> = <value2> ] ...}
创建方式
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| $hash = @{ Shape = "Circle"; Len = 2; Color= "Blue"}
$orderedHash = [ordered]@{ Shape = "Circle"; Len = 2; Color= "Blue"}
$hash['Len']
# 1
$hash +=@{Car='Bike'}
$hash.Add('driver','Steve')
$hash.GetEnumerator()| Sort-Object {$_.Key} -Descending
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特用
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| using namespace System.Text
[UTF8Encoding]@{}
[UTF32Encoding]::new()
[StringBuilder]@{capacity=24}
Get-Process|Sort-Object -Property {$_.VM} -Descending| Select-Object -First 20 -Property @{l='PID';e={$_.id}},@{n='进程名';e={$_.ProcessName}}| Sort-Object 'PID'
Get-Process| Where-Object {$_.ProcessName.StartsWith('run',$true,$null)}| Format-Table -GroupBy ProcessName -Property 'Id','ProcessName','StartTime',@{n='物理内存/bits';e={$_.WorkingSet64}}
$persist = @"
size = 12
msg = yap,"A bad idea"
notArrays = 1,2,3
"@
ConvertFrom-StringData $persist | % {$_.GetEnumerator()} | ft -Property 'Key','Value',@{l='Value`s Type';e={$_.Value.GetType()}}
#Key Value Value`s Type
#--- ----- ------------
#size 12 System.String
#msg "A bad idea" System.String
#ids @(1,23) System.String
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