我已经在这上面撞了几个小时了，谷歌也帮不上忙。
我有一个在代码中调用的函数。调用看起来像这样：

$newData = @(CreateMailContactIfNeeded $entry)

被调用的函数应该总是返回一个2元素数组。我在被调用函数的return语句之前确认了这一点：

# ... (inside CreateMailContactIfNeeded) ...
$tmpArr = @("$contactString" , "external")
Write-Host "length is" $tmpArr.length
Write-Host "Contact string is ->"$contactString"<-"
return $tmpArr

长度始终为2，并且联系人字符串始终为非空。样本输出：

length is 2
Contact string is -> GMSContact-33<-

（我无法剥离字符串中的前导空格，所以我假设这是某种内部powershell字符串格式或其他东西）
然而，当我回到调用函数时，有时，但不总是，我从返回值构建的数组是length three：

if ($newData.length -eq 3) {
  Write-Host "Weird - array length is 3..."
}

Write-Host "Array length now is "$newData.length
foreach ($tmpVar in $newData) {
  Write-Host "Array entry is "$tmpVar
}

3条目数组的第一个元素是有效的字符串，但它是早期处理的工件：

Weird - array length is 3...
Array length now is  3
Array entry is  Test User       <-- INVALID
Array entry is  GMSContact-33   <-- This should be first element
Array entry is  external        <-- This should be second element

有人能告诉我可能发生了什么以及如何解决它吗？我是否错误地进行了数组赋值？给定上面的代码，“测试用户”是如何被插入到数组中的？
编辑：CreateMailContactIfNeeded的完整内容如下...

function CreateMailContactIfNeeded {
  param($CSVEntry)

  $email = $CSVEntry.EMAIL_ADDR

  Write-Host    "--> Searching for $email"
  Write-Host -n "----> In AD? "
   # Return if this person already exists as a user in AD
  if (IsInOurADDomain $CSVentry) {
    Write-Host -f green "YES."
    Write-Host "Returning "$email "= inhouse"
    return @("$email" , "inhouse")
  } else {
    Write-Host -n -f gray "NO. "
  }

  $contactString = "GMSContact-" + $CSVEntry.MEMBER_ID
  Write-Host "Contact string is now " $contactString

  # Check if mail contact already exists. If not, create it.
  Write-Host -n "In Contacts? "
  $object = Get-MailContact $email 2> $null

  if ($object -eq $null) {
    $displayName = $CSVentry.FIRST_NAME + " " + $CSVentry.LAST_NAME

    Write-Host -n -f gray "NO. "
    Write-Host -n "Creating contact... "

    $error.clear()
    New-MailContact -Name $contactString                    `
                    -DisplayName $displayName               `
                    -ExternalEmailAddress $email            `
                    -OrganizationalUnit $global:OU_CONTACT_STRING  
    if ($error[0] -ne $null) {
      Write-Host -f red "ERROR"
      Write-Error $error[0]
      return @("error","error")
    }
    # Derek says to do this to make it appear in alternate address book
    Set-MailContact -identity $contactString -customattribute1 "AB2"
    Write-Host -f green "SUCCESSFUL"
  } else {
    Write-Host -f green "YES"
  }
  Write-Host "Returning" $contactString "= external"
  $tmpArr = @("$contactString" , "external")
  Write-Host "length is" $tmpArr.length
  Write-Host "Contact string is ->"$contactString"<-"
  Write-Host "Contact string length is "$contactString.length
   foreach ($tmp in $tmpArr) {
     Write-Host "In function element is "$tmp
   }
   return $tmpArr
#  return @("$contactString" , "external")
}