PowerShell: Rename Files, Space to Lowline

By Xah Lee. Date: . Last updated: .

Functions to rename file from space to lowline _.

function xah-list-file-name-contain-space {
    <#
.DESCRIPTION
List file whose name contains space. Of current dir.
.NOTES
Version: 2023-03-01
.EXAMPLE
xah-list-file-name-contain-space
.LINK
http://xahlee.info/powershell/powershell_rename_file_space_to_lowline.html
#>
    Get-ChildItem -Recurse -File -Filter "* *"
}

function xah-rename-file-space-to-lowline {
    <#
.DESCRIPTION
pipe files to this function to rename it.
.NOTES
Version: 2023-03-01 2023-03-03 2024-01-06
.EXAMPLE
dir | xah-rename-file-space-to-lowline
.LINK
http://xahlee.info/powershell/powershell_rename_file_space_to_lowline.html
#>
    Process {
        if ($null -eq $_) {
            Write-Host "Pipe is empty. Nothing is done."
            return
        }
        if ($_.name.contains(" ")) {
            $fname = $_.name;
            $newName = $fname.replace(" ", "_")
            Write-Host ("$_ → $newName")
            Rename-Item $_ $newName
        }
    }
}