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Your solution doesn't do the same thing, though. His code doesn't sort.

Sure it does: https://gist.github.com/brettcannon/82c4fe68bac30f4ed653#fil...

Sorry, you are right, I missed that.

Arguably your solution is still different because you sort the input instead of the output, but that's unlikely to matter here.

The only difference is I sort before uniquing, but the python code uniques before sorting. But the result is identical (and in shell scripting, you can't unique without sorting first).

Although FWIW I just checked and the `sort` tool actually has a flag for uniquing during the sort. I don't know if that's portable though.

Yes. Pedantically speaking his solution may be faster for the pathological case of the input consisting almost entirely of duplicates.

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