From: Sergio Ruiz <sergio@...>
Date: 2007-04-13T04:52:47+09:00
Subject: file manipulation

as a part of another program, i need to be able to keep an index number
inside of a file..

what i want to do is:

open the file
get its contents and store in a local variable
clear its contents
store an incremented version of the index..

right now, i know i am doing this in a kludgy way...

it works, but not pretty..

i end up opening the file 'r', getting the number
closing the file

opening it again 'w+'
storing the value
closing the file..

is there a method that will just clear the file?

my current code is:

  def self.get_index
    index_file = File.open('index','r')
    index = index_file.gets
    index_file.close
    index_file = File.open('index','w+')
    puts "index value: " + index.to_s
    index_file.puts(index.to_i + 1).to_s
    index_file.close
  end

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