From: Kurt Euler <keuler@...>
Date: 2002-07-15T07:07:55+09:00
Subject: How to delete a line in a file if....?

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