From: Daniel Bretoi <lists@...>
Date: 2002-07-15T07:39:16+09:00
Subject: Re: How to delete a line in a file if....?

Is something like this what you mean? (I didn't debug this btw)
fh = File.open("file","r");
out = File.open("file_result","w");
fh.each { |line|
	out.puts line unless line =~ /unwantedstring/
}
fh.close; out.close;

On Mon, Jul 15, 2002 at 07:07:55AM +0900, Kurt Euler wrote:
> All-
> 
> Please advise as to how I can delete a line in a file in which a given string appears.
> 
> I tried using the delete_if method in the following code, but it failed. (I suspect that delete_if might be an array method rather than a file method. In the code below, "content2" is a file, not an array.) 
> 
> 	if FileTest.exist?("input_installs/#{field[5]}" )
> 		install_file = ''
> 		File.open("./input_installs/#{field[5]}") { |f| install_file = f.read }
> 		content2.gsub!(/<install_template.txt>/, install_file)
> 		content2.delete_if { |l| l =~ "uncompress" }
> 	else
> 	(blah blah...)
> 
> 
> For the present, I'd prefer to avoid using arrays, so I need a way to search a file and delete any line in which a certain string (eg "uncompress") occurs.
> 
> Thanks!
> 
> -Kurt

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