Re: sort -nu: bug or feature?

[Andreas Schwab]

"Chris F.A. Johnson" <address@hidden> writes:

>      "sort -n" uses a string comparison after aligning the numbers on
>      the decimal point, but -u apparently uses a (non-POSIX) numeric
>      comparison to determine equivalency:

>From POSIX.1-2003:

-n
   Restrict the sort key to an initial numeric string, consisting of
   optional <blank>s, optional minus sign, and zero or more digits with an
   optional radix character and thousands separators (as defined in the
   current locale), which shall be sorted by arithmetic value. An empty
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   digit string shall be treated as zero. Leading zeros and signs on zeros
   shall not affect ordering.

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
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