将数组列表从第一个脚本传送到第二个脚本 [英] Piping an arraylist from first script to second script

问题描述

我需要将一个数组列表从脚本 n.1 传送到脚本 n.2 并用 while 循环修改它

I need to pipe an arraylist from script n.1 to script n.2 and modify it with a while cycle

[System.Collections.Arraylist]$ArrBkp=@()

$ArrObj = New-Object psobject -Property @{Type="Full";Id=1001}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1002}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Full";Id=1003}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1004}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1005}
[void]$ArrBkp.Add($ArrObj)

$ArrBkp

脚本 n.2 - PS-Rest.ps1

[CmdletBinding()]Param(
[Parameter(ValueFromPipeline=$true)]
$ArrBkp,
[Parameter()]
$Id
)

$ArrBkp.Reverse()

foreach ($Bkp in $ArrBkp) {
    while ($Bkp.Id -gt $Id) {$Bkp;$ArrBkp.Remove($Bkp)}
}

$ArrBkp

我期望的是:

PS C:\Users\dio\Documents\script\PS-Rest> .\PS-GetBak.ps1 | .\PS-Rest.ps1 -Id 1004
   Id Type
   -- ----
 1004 Diff
 1003 Full
 1002 Diff
 1001 Full

说明:while 循环应该从数组列表中删除 Id 值为 gt 1004 的对象

Explained: while loop should remove object from arraylist that has Id value gt 1004

实际结果:只有来自 arraylist 的最后一个值通过管道传输到脚本 n.2 导致 while 循环错误

Actual result: Only the last value from arraylist is piped to the script n.2 causing while loop error

In C:\Users\dio\Documents\script\PS-Rest\PS-Rest.ps1:11 car:49
+     while ($Bkp.Id -gt $Id) {$Bkp;$ArrBkp.Remove <<<< ($Bkp)}
    + CategoryInfo          : InvalidOperation: (Remove:String) [], RuntimeException
    + FullyQualifiedErrorId : MethodNotFound

推荐答案

好的，我重新设计了它，所以它非常接近原版.除了我通过属性名称传递管道.我有点走私子属性下的数组列表.出于某种原因，PS 脚本无法返回顶层的数组列表.无论如何，管道一次只能处理一个元素.并收集要删除的元素，然后在第二个循环中删除.这样它就不会破坏第一个循环.此外，使用 while 语句没有意义，因为条件在移除后永远不会改变.

Ok, I reworked it, so it's pretty close to the original. Except I'm passing on the pipe by property name. I'm sort of smuggling the arraylist under a sub-property. For some reason, a PS script can't return an arraylist at the top level. And a pipeline would only process an element at a time anyway. And collecting the elements to delete, and then deleting in a second loop. This way it doesn't break the first loop. Also, having a while statement doesn't make sense, since the condition would never change after a remove.

ps-getbk.ps1:

ps-getbk.ps1:

[System.Collections.Arraylist]$ArrBkp=@()

$ArrObj = New-Object psobject -Property @{Type="Full";Id=1001}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1002}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Full";Id=1003}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1004}
[void]$ArrBkp.Add($ArrObj)

$ArrObj = New-Object psobject -Property @{Type="Diff";Id=1005}
[void]$ArrBkp.Add($ArrObj)

[pscustomobject]@{ArrBkp=$ArrBkp}

ps-rest.ps1:

ps-rest.ps1:

[CmdletBinding()]Param(
  [Parameter(ValueFromPipelineByPropertyName=$true)]
  $ArrBkp,
  [Parameter()]$Id
)

$ArrBkp.Reverse()

$dellist = foreach ($Bkp in $ArrBkp) {
    if ($Bkp.Id -gt $Id) {$Bkp}
}

foreach ($Bkp in $dellist) {
    $ArrBkp.remove($Bkp)
}

$ArrBkp

来自 .\PS-GetBak.ps1 的输出 |.\PS-Rest.ps1 -Id 1004

  Id Type
  -- ----
1004 Diff
1003 Full
1002 Diff
1001 Full

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