remove empty lines from text file with PowerShell

Question

I know that I can use   gc c  FileWithEmptyLines txt   where     -ne      gt  c  FileWithNoEmptyLines txt   to remove empty lines  But How I can remove them with  -replace

User · Answer

This will remove empty lines or lines with only whitespace characters  tabs spaces     IO File   ReadAllText  FileWithEmptyLines txt   -replace   s  r n      r n    Out-File  c  FileWithNoEmptyLines txt

User · Answer

I found a nice one liner here    http   www pixelchef net remove-empty-lines-file-powershell  Just tested it out with several blanks lines including newlines only as well as lines with just spaces  just tabs  and combinations    gc file txt          trim   -ne        set-content file txt   See the original for some notes about the code  Nice

User · Answer

file      PS  home edward Desktop  Get-Content   copy txt       Desktop Entry          Name calibre   Exec   Apps calibre calibre      Icon   Apps calibre resources content-server calibre png      Type Application      Start by get the content from file and trim the white spaces if any found in each line of the text document  That becomes the object passed to the where-object to go through the array looking at each member of the array with string length greater then 0  That object is passed to replace the content of the file you started with  It would probably be better to make a new file     Last thing to do is reads back the newly made file s content and see your awesomeness         Get-Content   copy txt  Trim     Where-Object    length -gt 0    Set-Content   copy txt      Get-Content   copy txt

User · Answer

To resolve this with RegEx  you need to use the multiline flag   m      Get-Content file txt -Raw  -replace    m   s  r n      trim     Set-Content file txt

User · Answer

If you actually want to filter blank lines from a file then you may try this    gc  source file  Trim           Length -gt 0

User · Answer

You can use -match instead -eq if you also want to exclude files that only contain whitespace characters     gc c  FileWithEmptyLines txt  -match   S     out-file c  FileWithNoEmptyLines

User · Answer

This removes trailing whitespace and blank lines from file txt  PS C  Users  gt   gc file txt    Foreach     TrimEnd      where     -ne       Set-Content file txt

User · Answer

Get-Content c  FileWithEmptyLines txt         Foreach      -Replace   Old content     New content           Set-Content c  FileWithEmptyLines txt

User · Answer

This piece of code from Randy Skretka is working fine for me  but I had the problem  that I still had a newline at the end of the file       gc file txt          trim   -ne        set-content file txt   So I added finally this    content    System IO File   ReadAllText  file txt    content    content Trim    System IO File   WriteAllText  file txt    content

User · Answer

Not specifically using -replace  but you get the same effect parsing the content using -notmatch and regex    get-content  c  FileWithEmptyLines txt   -notmatch    s     gt  c  FileWithNoEmptyLines txt

User · Answer

You can t do replacing  you have to replace SOMETHING with SOMETHING  and you neither have both

[powershell] remove empty lines from text file with PowerShell

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