Question with reading and editing lines in a file

[Chris Dancy]

The idea is to read a line from a file ... parse it and put it back in. The code I'm using now is not working ... it's deleting the entire file.

		@serverName = "localhost"
		@serverPort = "8080"
		
		properServerName = "MOMMY"
		properPortName = "BEARS"

		File.open("bears.txt","r").each_line { |line|

			line.gsub!(/#{@serverName}/, properServerName)
			line.gsub!(/#{@serverPort}/,properPortName)
			puts line
		}

I assume I'm doing something wrong I just don't know what ... any ideas?

[Marc Peabody]

If you install the Facets gem (the command: "gem install facets") it can be as easy as:

require 'facets'
File.rewrite("bears.txt"){|f| f.gsub('localhost','MOMMY').gsub('8080','BEARS') }

Facets adds the rewrite method to File which makes it easy to do what you want.

[Chris Dancy]

That's pretty sweet Marc. What I ended up doing was reading the entire file into an array and editing the lines there then re-writing the file .... however what I wanted to do was exactly what you just should me. I will have to play around with that snippet of code. Thanks for showing me.