Re: Removing repeated lines from file

by broquaint (Abbot)

on Jun 24, 2003 at 11:44 UTC ( [id://268459]=note: print w/replies, xml )

Need Help??

Time for one of them nifty one-liners

perl -ni -e 'print if $last ne $_; $last = $_' your_file
[download]

See. perlrun for more info.
HTH

_________ broquaint

Comment on Re: Removing repeated lines from file Download Code

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Re: Re: Removing repeated lines from file by YAFZ (Pilgrim) on Jun 24, 2003 at 11:54 UTC
I´ve just created a file called repetitive.txt on my Cygwin system and used perl, v5.6.1 to try your one liner but it gave an error: Can't do inplace edit on repetitive.txt: Permission denied. And to my surprise the file was deleted. What can be the reason of that behaviour? Did I miss something?	[reply]
Re: Re: Re: Removing repeated lines from file by jmcnamara (Monsignor) on Jun 24, 2003 at 12:35 UTC
Perl on Windows can't use `-i` without an extension. I guess the same applies to Cygwin. Try `-ni.bak` instead. -- John.	[reply]
Re: Re: Re: Re: Removing repeated lines from file by YAFZ (Pilgrim) on Jun 24, 2003 at 12:44 UTC
Thanks, it worked without problems and errors :)	[reply]

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