Chas. Owens wrote:
On Wed, Feb 18, 2009 at 19:59, Gunnar Hjalmarsson <[email protected]> wrote:
Chas. Owens wrote:
snip
This is not the best way to go about solving this problem (use diff or a
module like Text::Diff*),
If we are going to suggest a module, List::Compare would be more to the
point IMO.
snip
No, the lines should not make it out of the files into arrays in the
first case. Reading whole files into arrays is one of the reasons
this code is bad.
Well, I see it as a directory comparison problem rather than a general
file comparison problem. The reason that at least one of the listings
had been saved in a file seems to be that the directory is located on
some other server.
It's true that reading whole files into arrays often consumes memory
unnecessarily, but give it a thought how much memory a complete text
file comparison would have consumed.
snip
It is important to note that this algorithm only works if you care about
unique lines. If you need to know that file1 has 5 lines of "foo" and file2
has 4 lines of "foo", this code will not tell you that.
Since the files contain file names from directory listings, that cannot be
applicable to the problem at hand.
snip
Yes, but it is an important thing to note lest you try to use it for
something else later.
Absolutely; this is not a general solution for comparing text files.
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Gunnar Hjalmarsson
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