Powershell Out-File无法按预期使用反向字符串

Question

I need to write a file backwards line by line to another file. I can get it to work fine in the PowerShell window, but when I try to pipe it to an Out-File , it doesn't work. This is my script:

Get-Content C:\Users\Administrator\Desktop\files.txt | ForEach-Object {
    $text = $_.toCharArray()
    [Array]::Reverse($text)
    -join $text | Out-File 'C:\Users\Administrator\Desktop\reversed.txt'
}

This actually creates a file on the Desktop, but doesn't give it any content.

If I simply don't pipe to Out-File on the last line, it works fine, and prints the reversed file straight to the PowerShell window.

I have tried it with and without the single quotes, as well as using the -FilePath option. Nothing's working. Any ideas out there?

Answer 1

Since the -Append parameter is not used, Out-File will overwrite the file each time it processes a line from the source file. I suspect the last line of the source file is an empty line which is why you see nothing in the output file.

The proper way to do this is as @TheMadTechnician suggests:

Get-Content C:\Users\Administrator\Desktop\files.txt | 
    ForEach-Object {
        $text = $_.toCharArray()
        [Array]::Reverse($text)
        -join $text
    } | 
    Out-File C:\Users\Administrator\Desktop\reversed.txt