From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-04-04T23:16:43+09:00
Subject: Re: Reading contents of all files from a Directory

On Sun, Apr 4, 2010 at 3:06 PM, Hawksury Gear <blackhawk_932@hotmail.com> wrote:
>> If it is only for output purposes, we can actually do it in one line:
>>
>> puts Dir["K:/test/*"].map {|f| File.read f}
>>
>> Note: this is not necessarily efficient nor safe (just think of 3GB
>> files...).
>>
>> Kind regards
>>
>> robert
>
> Many Thanks for replying robert, I am trying to print the contents of
> each file
> in the following way,It isn't giving me any error message but it is not
> showing any output, Could you please help.
>
>  arr= Dir.open("K:/test").entries
>  arr.each do| file |
>      File.open("file","a+") do |fd|
>        fd.each {|line| print line}
>        end
>

You have two errors there. "file" is a literal string, not the
contents of the variable file. Use file without quotes.

The second:

http://ruby-doc.org/core/classes/IO.html

Take a look at the documentation of the open modes:

  "a+" |  Read-write, starts at end of file if file exists,
       |  otherwise creates a new file for reading and
       |  writing.


Starts at the end of the file, so there's nothing else to read...
You probably want this instead:

File.open(file, "r") do |file|
...
end

Jesus.