powershell - 哈希表和键顺序

Question

有没有办法在添加键时将键的顺序保持在哈希表中？就像推送/弹出机制。

例:

$hashtable = @{}

$hashtable.Add("Switzerland", "Bern")
$hashtable.Add("Spain", "Madrid")
$hashtable.Add("Italy", "Rome")
$hashtable.Add("Germany", "Berlin")
$hashtable

我想保留将元素添加到哈希表的顺序。

Answer 1

PowerShell V1 / V2中没有内置解决方案。您将要使用.NET
System.Collections.Specialized.OrderedDictionary :

$order = New-Object System.Collections.Specialized.OrderedDictionary
$order.Add("Switzerland", "Bern")
$order.Add("Spain", "Madrid")
$order.Add("Italy", "Rome")
$order.Add("Germany", "Berlin")


PS> $order

Name                           Value
----                           -----
Switzerland                    Bern
Spain                          Madrid
Italy                          Rome
Germany                        Berlin

在PowerShell V3中，您可以强制转换为[ordered]:

PS> [ordered]@{"Switzerland"="Bern"; "Spain"="Madrid"; "Italy"="Rome"; "Germany"="Berlin"}

Name                           Value
----                           -----
Switzerland                    Bern
Spain                          Madrid
Italy                          Rome
Germany                        Berlin