如何将有序哈希表传递给函数?
- function doStuff {
- Param (
- [ordered]$theOrderedHashtable
- )
- $theOrderedHashtable
- }
- $datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
- doStuff -theOrderedHashtable $datFileWithMinSizes
以下不保持正确的顺序:
- function doStuff {
- Param (
- [Hashtable]$theOrderedHashtable = [ordered]@{}
- )
- $theOrderedHashtable
- }
- $datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
- doStuff -theOrderedHashtable $datFileWithMinSizes
我目前能够使用它的唯一方法是不指定类型如下,但我想指定类型:
- function doStuff {
- Param (
- $theOrderedHashtable
- )
- $theOrderedHashtable
- }
- $datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
- doStuff -theOrderedHashtable $datFileWithMinSizes
解决方法
使用完整类型名称:
- function Do-Stuff {
- param(
- [System.Collections.Specialized.OrderedDictionary]$OrderedHashtable
- )
- $OrderedHashtable
- }
要支持常规哈希表和有序词典,您必须使用单独的参数集:使用[System.Collections.IDictionary]接口,如suggested by briantist
- function Do-Stuff {
- [CmdletBinding(DefaultParameterSetName='Ordered')]
- param(
- [Parameter(Mandatory=$true,Position=0,ParameterSetName='Ordered')]
- [System.Collections.Specialized.OrderedDictionary]$OrderedHashtable,[Parameter(Mandatory=$true,ParameterSetName='Hashtable')]
- [hashtable]$Hashtable
- )
- if($PSCmdlet.ParameterSetName -eq 'Hashtable'){
- $OrderedHashtable = $Hashtable
- }
- $OrderedHashtable
- }