Traverse through List of Documents using PowerShell

Question

I am new to PowerShell and would like to achieve the following tasks on a SharePoint 2010 Document library:

1) Using PowerShell, how can I display the List of Documents in a simple Document Library.

2) While traversing through the documents list, how can I modify the value of a custom added column in the Document Library?

Answer 1

Here's a simple example of how to display and update the 'title' field that could be modified slightly to achieve this:

[void][System.reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") 

$site = new-object Microsoft.SharePoint.SPSite("http://intranet")                                                        
$web = $site.rootweb                                                                                                

$list = $web.Lists["Documents"] 

foreach ($listItem in $list.Items)
{
    #display the filename of the document
    write-host $listItem.Name

    #update the title field to the filename
    $listItem["Title"] = $listItem["Name"]
    $listItem.Update()
}

$web.Dispose()
$site.Dispose()