Nyizsnyik Ferenc wrote:
On Sun, 24 May 2009 12:54:42 -0400
Tony Baldwin <[email protected]> wrote:
Wilfred Zegwaard wrote:
Dear users,
I've got a textfile with a lot of duplicate text. How do I remove
it? I'm using Emacs 21.
Wilfred
That seems like a very general question, and one which has a broad
plethora of answers.
Exactly; here is a simple one:
uniq -u infile outfile
Wow, that's cool. I never saw uniq before.
I just read the man and tried it out.
Wouldn't he just want
uniq infile outfile
since -u option will remove all instances
of a repeated element, where as uniq f1 f2
will leave one instance of said repeating element?
I did
for 1 in 1 2 3 4 5 6 7 8 9; do echo banana >> banana; done
then echo "orange you glad I didn't say banana? " >> banana
then
uniq -u banana orange
cat orange
orange you glad I didn't say banana?
then did
uniq banana orange # no -u
cat orange
banana
orange you glad I didn't say banana?
so it kept one banana.
/tony
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art & photos | tony baldwin
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