# ==============================================================================================
# 
# Microsoft PowerShell Source File -- Created with SAPIEN Technologies PrimalScript 2009
# 
# NAME: Demo-HashTable.ps1
# 
# AUTHOR: Jeffery Hicks , SAPIEN Technologies
# DATE  : 2/19/2009
# 
# COMMENT: Demonstration of Associative arrays in PowerShell. 
# 
# ==============================================================================================

#create a hash table with values
$hash=@{Name="Jeff Hicks";Title="Scripting Guru";
Url="blog.sapien.com";Extension="x123"}

#view the contents
$hash

#create an empty hash table
$hash=@{}

$computername=$env:computername
[ADSI]$Server="WinNT://$computername"

$users=$server.psbase.children | where {
 $_.psbase.schemaclassname -eq "user"
 }
 
#add items to the hash table
foreach ($user in $users) {
 $hash.Add($user.name[0],($user.passwordage[0]/86400 -as [int]))
}

Write-Host ("There are {0} users in the hash table." -f $hash.count)

#see if a key exists and if so get its value
if ($hash.containsKey("administrator")) {
 Write-Host ("{0} Administrator Password age = {1} days" -f 
 $computername,$hash.Item("administrator"))
}

#or access items by key
$hash.Administrator
#or like this
$hash["administrator"]

#view the contents of the hash table
$hash

#view the contents sorted by key
$hash.GetEnumerator() | sort 

#or by value
$hash.GetEnumerator() | sort value -descending

#remove an item
if ($hash.containskey("guest")) {
    $hash.remove("guest")
}

$hash.keys | foreach {
    $lastChanged=((Get-Date).AddDays(-($hash.item($_)))).ToShortDateString()
    $obj=New-Object PSObject
    $obj | Add-Member Noteproperty "Computer" $computername
    $obj | Add-Member Noteproperty "User" $_
    $obj | Add-Member Noteproperty "PasswordAge" $hash.item($_)
    $obj | Add-Member Noteproperty "LastChanged" $lastChanged
    write $obj
} | sort PasswordAge -descending | Format-Table -Autosize

#remove all
$hash.Clear()