From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-11-09T02:23:11+09:00
Subject: Re: Comparing/search struct array

On Mon, Nov 8, 2010 at 6:14 PM, Josh Cheek <josh.cheek@gmail.com> wrote:
> 2010/11/8 Szabolcs Tóth <tsz@purzelbaum.hu>
> f = File.open("report.output", 'r').each {|line|
>>  if line =~ /MST Revenue/
>>
>>
> Tricky to find this one in the docs, its actually under IO rather than File
> http://ruby-doc.org/core/classes/IO.html#M002239 "If the optional code block
> is given, it will be passed *io* as an argument, and the
> IO<http://ruby-doc.org/core/classes/IO.html>object will automatically
> be closed when the block terminates." So you can
> let File close the file for you (this is considered a best practice, since
> it does certain things to ensure this will happen, even if an error is
> raised)
>
> File.open 'report.output' do |file|
>  file.each do |line|
>    ...
>  end
> end

If you are not doing anything else with the file apart from reading
the lines you could also do:

File.foreach("report.output") do |line|
  ...
end

Jesus.