I concur. This is extremely clever.

It has the downside that it doesn't scale so well if you need to allow more than one char difference. But for the OPs stated problem, quite brilliant.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Comparing a large set of DNA sequences by BrowserUk
in thread Comparing a large set of DNA sequences by shamshersingh

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