Powershell text procesing: Join specific lines of a txt file - powershell

Question

I have to process some text and got some difficulties:
The text .\text.txt is formatted like that:
name,
surname,
address,
name.
surname,
address,
etc.
What I want to achieve is join the objects that ends with the "," like this:
name,surname,address
name,surname,address
etc
I was working on something like this:
$content= path to the text.txt
$result= path to the result file
Get-Content -Encoding UTF8 $content | ForEach-object {
if ( $_ -match "," ) {
....join the selected lines....
}
} |Set-Content -Encoding UTF8 $result
What I need to consider is also that lines which terminate with "," may have a next line empty which should be a CR in the $result

Answer 1

You can do this by splitting the blocks of data on the empty newlines first:
# read the content of the file as one single multiline string
$content = Get-Content -Path 'Path\To\The\file.txt' -Raw -Encoding UTF8
# split on two or more newlines and dispose of empty blocks
$content -split '(\r?\n){2,}' | Where-Object { $_ -match '\S' } | ForEach-Object {
# trim the text block, split on newline and remove the trailing commas (or dots)
# output these joined with a comma
($_.Trim() -split '\r?\n' ).TrimEnd(",.") -join ','
} | Set-Content -Path 'Path\To\The\NEW_file.txt' -Encoding UTF8
Output:
name,surname,address
name,surname,address

Answer 2

all your terms ends with a , so you could use regex:
$content= "C:\test.txt"
$result= "path to the result file"
$CR = "`r`n"
$lines = Get-Content -Encoding UTF8 $content -raw
$option = [System.Text.RegularExpressions.RegexOptions]::Singleline
$lines = [regex]::new(',(?:\r?\n){2,}', $option).Replace($lines, $CR + $CR)
$lines = [regex]::new(',\r?\n', $option).Replace($lines, ",")
$lines | Out-File -FilePath $result -Encoding utf8
result:
name,surname,address
name1,surname,address
name,surname,address
name,surname,address

Answer 3

Below piece of code will give the required result.
$content= "Your file path"
$resultPath = "result file path"
Get-Content $content | foreach {
$data = $_
if($data -eq "address,")
{
$NewData = $data -replace ',',''
$data = $NewData + "`r`n"
}
$out = $out + $data
}
$out | Out-File $resultPath