Finding similarity between two bodies of text

[Atelier]

Anybody know how I can search for the percentage difference between two large bodies of text?

I basically need to find out if they are 100% identical - without painstakingly reading them manually of course.


PS. Unsure whether this is fit for Rumpus Room or General Discussion.

[cat]

You are looking for a diff tool I guess?

A quick search brings up this tool: https://www.diffchecker.com/diff

[Crimson Wizard]

If the text is in files on your disk, there is a good bunch of text comparison tools.

To name a couple of favourites:
WinMerge
KDiff

[Atelier]

That's brilliant, thanks cat and Crimson

I did google it but was obviously dumb in my choice of search term.

[Monsieur OUXX]

The tools named previously are great, but if you want to stick to a general-purpose tool without installing an extra application, then use Notepad++ (note the "++"). You should have already have it on your computer, like every civilized person on this planet. Then simply add the Compare plugin. You're done.

[Gurok]

Pish pash! Civilised people use AGS and implement this algorithm:

http://en.wikipedia.org/wiki/Levenshtein_distance#Iterative_with_two_matrix_rows