Hi Felipe,
On Tue, Oct 11, 2016 at 12:43 PM, Felipe Vieira wrote:
> Dear mailing list,
>
> the uniq program seems to be faulty on my cygwin:
>
> /tmp » cat u.txt
> 1
> 2
> 3
> 4
> 5
> 1
> 2
> 3
> 6
> 7
> 8
>
>
> /tmp » uniq -c u.txt
> 1 1
> 1 2
> 1 3
> 1 4
> 1 5
> 1 1
> 1 2
> 1 3
> 1 6
> 1 7
> 1 8
> 1
> /tmp »
>
> As you can see it does not eliminate duplicate lines.
> This file was created with vim. Same results if created with windows notepad.
> What am I missing?
You are missing an important step: reading the manual.
$ man uniq
UNIQ(1)
User Commands
UNIQ(1)
NAME
uniq - report or omit repeated lines
SYNOPSIS
uniq [OPTION]... [INPUT [OUTPUT]]
DESCRIPTION
Filter adjacent matching lines from INPUT (or standard input),
writing to OUTPUT (or standard output).
^^^^^^^^^
uniq collapses identical lines only if they are consecutive.
The typical way to ensure this is to sort the file first.
$ sort c.txt | uniq
Csaba
--
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The Tao of math: The numbers you can count are not the real numbers.
Life is complex, with real and imaginary parts.
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