Hi ,

Thanks a lot for all ur replies.. My problem is I could't require 
'diff/lcs'. I am getting an error message like.

c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in 
`gem_original_require': no such file to load -- diff/lcs/Array 
(LoadError)

Should I install any additional gem. kindly help me

Thanks,
venkat

Daniel Berger wrote:
> On Feb 25, 10:55?am, James Gray <ja... / grayproductions.net> wrote:
>> On Feb 25, 2009, at 11:17 AM, Venkat Kumar wrote:
>>
>> > I need compare two text files. I should require 'diff/lcs/Array' ?
>> > when i
>> > do this iam getting error.
>>
>> I've tried using that library in the past, but its interface just ?
>> makes it crazy hard to work with.
> 
> I came up with this for diff'ing 2 files and spitting the results to
> stdout. It's meant to simulate "diff -u" output, but it's not quite
> identical and is definitely not tested thoroughly:
> 
> # diff_test.rb
> require 'diff/lcs'
> 
> # The file 'test1.txt' contains the following 3 lines:
> #
> # This is a house
> # Hello World
> # My favorite color is blue
> #
> # The file 'test2.txt' contains the following 3 lines:
> #
> # This is a car
> # Hello World
> # My favorite color is green
> 
> module Diff
>    module LCS
>       def self.diff_files(file1, file2)
>          array1 = IO.readlines(file1)
>          array2 = IO.readlines(file2)
>          diffs = diff(array1, array2)
> 
>          print diffs.first[0].action * 3 + ' '
>          print file1
>          print "\t" + File.mtime(file1).to_s
> 
>          puts
> 
>          print diffs.first[1].action * 3 + ' '
>          print file2
>          print "\t" + File.mtime(file2).to_s
> 
>          puts
> 
>          diffs.each_with_index{ |diff, i|
>             diff.each{ |d|
>                puts d.action + d.element
>             }
>          }
>       end
>    end
> end
> 
> Diff::LCS.diff_files('test1.txt', 'test2.txt')
> 
> Here was the output of Diff::LCS.diff_files:
> 
> --- test1.txt   Wed Feb 25 12:18:42 -0700 2009
> +++ test2.txt   Wed Feb 25 12:18:53 -0700 2009
> -This is a house
> +This is a car
> -My favorite color is blue
> +My favorite color is green
> 
> Hope that was useful.
> 
> Regards,
> 
> Dan

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