From: James Britt <james.britt@...>
Date: 2006-08-05T14:01:09+09:00
Subject: Re: Simple Reading, Deleting and Writing to Files

Skeets wrote:

> 
> what i don't know how to do is to...
> 
> 1. write this data to a newly created file (case: file doesn't exist)

File.open( some_file_name, 'w'){|f| f.puts(the_data)}

> 2. overwrite the data (case: file exists but data needs to be updated).
You can use the same code.  It will overwrite the current file with the 
new data.

> 
> eg, let's say my ip changed to 127.0.0.2.  i want to delete "#ip
> 127.0.0.1" and replace it with "#ip 127.0.0.2".  i i'd also consider if
> deleting just 127.0.0.1 and replacing it with 127.0.0.2 if it makes
> more sense.

Just overwrite the old file with the new, complete, data.


> 
> can anyone point me to a tutorial or lend a hand?
> 

Look at

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

and

  http://www.ruby-doc.org/core/classes/File.html

Note that the File class inherits from IO, so behavior of interest may 
be defined in either place.

-- 
James Britt

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