From: Simon Strandgaard <neoneye@...>
Date: 2006-11-28T16:38:04+09:00
Subject: Re: how to write file before EOF

On 11/28/06, Siva Prakasam <siva@360in.com> wrote:
>
>    how to write a file before its EOF
>    by giving some position .


If you just want  to append to a file, then you can do like this:

irb(main):001:0> File.open("test", "a") {|f| f.write('a') }; IO.read("test")
=> "a"
irb(main):002:0> File.open("test", "a") {|f| f.write('b') }; IO.read("test")
=> "ab"
irb(main):003:0> File.open("test", "a") {|f| f.write('c') }; IO.read("test")
=> "abc"
irb(main):004:0>


if you want to seek backwards and write stuff

irb(main):005:0> File.open("test", "w") {|f| f.write('abcdefg') };
IO.read('test')
=> "abcdefg"
irb(main):006:0> File.open("test", "r+") {|f| f.seek(-5,
IO::SEEK_END); f.write("XYZ") }; IO.read('test')
=> "abXYZfg"
irb(main):007:0>


--
Simon Strandgaard
http://opcoders.com/