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Ruby: how to match double quote in regex

I am trying to remove some double quotes (") from a text file using Ruby one liner with little success.

I have tried the following and some variations with no success.

ruby -pe 'gsub(/\"/,"")' < myfile.txt

This gives me the following error:

-e:1: Invalid argument - < (Errno::EINVAL)

I am running Ruby on a Win machine:

ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]

Any idea?

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4 answers


Seems like cmd is quoting hell - note that single quotes are meaningless in the cmd shell.

ruby -pe "gsub(34.chr,'')" < filename


but this is probably better:

ruby -pe "$_.delete!(34.chr)" < filename
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What about:



ruby -e 'puts $stdin.read.gsub(34.chr,"")' <myfile.txt
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ruby -pe 'gsub(/\"/,"")' myfile.txt
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It looks like the problem is with the shell.

Your error message is from Ruby, so it seems like Ruby is receiving <

as an argument. This means that the shell does not perform any redirects.

I don't have a windows machine, so I would double-clarify that you are redirecting first. On first inspection, I think there < myfile.txt

should be<myfile.txt

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