Replace the content of a textfile with a regex in powershell

Question

I have a simple textfile and I need a powershell script to replace some parts of the file content.

My current script is the following:

$content = Get-Con         


        

Answer 1

Is it possible to write it in one line without the content variable, like this?

Yes: use ForEach-Object (or its alias %) and then $_ to reference the object on the pipeline:

Get-Content -path "Input.json" | % { $_ -Replace '"(\d+),(\d{1,})"', '$1.$2' } |  Out-File "output.json"

Is it possible to do more replacements than one in a pipeline.

Yes.

1. As above: just adding more Foreach-Object segments.

2. As -replace returns the result, they can be chained in a single expression:

   ($_ -replace $a,$b) -replace $c,$d
   

   I suspect the parentheses are not needed, but I think they make it easier to read: clearly more than a few chained operators (especially if the match/replacements are non-trivial) will not be clear.