Powershell snippet to do something with items with matching names in a directory

RenameFilesMatchingPattern.ps1

Get-ChildItem |
Where-Object -Property "Name" -Like "*remove this part from the filename*" | # filtering
ForEach-Object { 
  # action to do. Case in point: rename the file. Note the parentheeses around the two parameters.
  Move-Item ($_.Name) ([System.Text.RegularExpressions.Regex]::Replace($_.Name, "remove this part from the filename", "")) 
}