Steve Fenton

Remove blank lines from a file with PowerShell

When importing a file full of data into a test system, I discovered that the CSV library I was using to do all the work was stopping when it reached a blank line. That makes sense, it thinks the data has ended. On inspection, I found quite a lot of blank lines, so there was no way I was going to fix them all manually. Instead of spending five minutes manually removing lines, I spent five minutes writing this PowerShell to do it… and I’ve made it run each time the test file is created.

We have a pretty simple command-triplet here, Get-Content sends the lines into the Where-Object filter, which only returns non-blank lines for Set-Content to drop in the output file.

(Get-Content $inputFile) | Where-Object {$_.trim() -ne "" } | Set-Content $outputFile

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