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comp.lang.ruby

Problem with files comparing

Cheyne Li

5/12/2008 9:59:00 PM

Hi, there

My problem is to compare two files in the same directory as the program
does.

the code is:

require 'ftools'
def fcmp
from = 'my_log.txt'
to = 'my_log_e.txt'
if compare(from,to, verbose = false) then
puts 'Identical.'
else
puts 'Different.'
end
end

After running the function. There's no result as all. Is there anybody
has the idea what's wrong with it?
--
Posted via http://www.ruby-....
6 Answers

Dave Thomas

5/12/2008 10:04:00 PM

0


On May 12, 2008, at 4:58 PM, Cheyne Li wrote:
> require 'ftools'
> def fcmp
> from = 'my_log.txt'
> to = 'my_log_e.txt'
> if compare(from,to, verbose = false) then
> puts 'Identical.'
> else
> puts 'Different.'
> end
> end
>
> After running the function. There's no result as all. Is there anybody
> has the idea what's wrong with it?


You probably need to call your function.


Dave

Cheyne Li

5/12/2008 10:29:00 PM

0

Dave Thomas wrote:
> On May 12, 2008, at 4:58 PM, Cheyne Li wrote:
>>
>> After running the function. There's no result as all. Is there anybody
>> has the idea what's wrong with it?
>
>
> You probably need to call your function.
>
>
> Dave

Hi, Dave

I tried put them in a class, and tested, but it kept throwing me the
error message. The code and error message are in the following:

class Cmprocess
# Create the object
def initialize(from,to)
@from = from
@to = to
end

def fcmp
require 'ftools'
compare(@from,@to, true)
end

r= Cmprocess.new("my_log.txt","my_log_e.txt")

if r.fcmp then
puts "Identical files."
else
puts "Different files."
end

end


C:\Documents and Settings\cheynel\My
Documents\NetBeansProjects\task1\lib\fcmp.rb:11:in `fcmp': undefined
method `compare' for #<Cmprocess:0xb40ec4 @to="my_log_e.txt",
@from="my_log.txt"> (NoMethodError)
from C:\Documents and Settings\cheynel\My
Documents\NetBeansProjects\task1\lib\fcmp.rb:16
from C:\Documents and Settings\cheynel\My
Documents\NetBeansProjects\task1\lib\fcmp.rb:2


I used netbean for ruby to ran it
--
Posted via http://www.ruby-....

Dave Thomas

5/12/2008 10:34:00 PM

0


On May 12, 2008, at 5:29 PM, Cheyne Li wrote:
> I tried put them in a class, and tested, but it kept throwing me the
> error message. The code and error message are in the following:


1. It's relatively unusual to create instances of a class inside the
class body, but that won't cause this problem

2. Where do you define the 'compare' method?


Dave

Cheyne Li

5/13/2008 4:22:00 PM

0

Dave Thomas wrote:
> On May 12, 2008, at 5:29 PM, Cheyne Li wrote:
>> I tried put them in a class, and tested, but it kept throwing me the
>> error message. The code and error message are in the following:
>
>
> 1. It's relatively unusual to create instances of a class inside the
> class body, but that won't cause this problem
>
> 2. Where do you define the 'compare' method?
>
>
> Dave

compare is a std mathod in ftools.rb
--
Posted via http://www.ruby-....

Dave Thomas

5/13/2008 4:27:00 PM

0


On May 13, 2008, at 11:21 AM, Cheyne Li wrote:
> compare is a std mathod in ftools.rb

Then you'd need to say File.compare, and not just compare.


Dave

Cheyne Li

5/13/2008 5:54:00 PM

0

Dave Thomas wrote:
> On May 13, 2008, at 11:21 AM, Cheyne Li wrote:
>> compare is a std mathod in ftools.rb
>
> Then you'd need to say File.compare, and not just compare.
>
>
> Dave

Ok. I c. Thanks man
--
Posted via http://www.ruby-....