Private/Get-FileGroupedByExtension.ps1
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function Get-FilesGroupedByExtension { <# .SYNOPSIS Groups files by their extensions. .PARAMETER Files Array of FileInfo objects to group. #> param( [Parameter(Mandatory)] [System.IO.FileInfo[]]$Files ) $filesByExtension = @{} foreach ($file in $Files) { $ext = $file.Extension.ToLower() if (-not $filesByExtension.ContainsKey($ext)) { $filesByExtension[$ext] = [System.Collections.Generic.List[object]]::new() } $filesByExtension[$ext].Add($file) } return $filesByExtension } |