Date: Fri, 12 May 2006 11:27:08 -0400 From: Chuck Swiger <cswiger@mac.com> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: Martin McCormick <martin@dc.cis.okstate.edu>, freebsd-questions@freebsd.org Subject: Re: Trimming Whitespace From Beginning and end of Text Lines Message-ID: <4464A94C.6020606@mac.com> In-Reply-To: <20060512150608.GB25497@gothmog.pc> References: <200605121450.k4CEokhn022089@dc.cis.okstate.edu> <20060512150608.GB25497@gothmog.pc>
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Giorgos Keramidas wrote: > This fails to remove multiple occurences of the [[:space:]] class. > > There are at least the following ways: > > sed -i -e 's/^[[:space:]]*' -e 's/[[:space:]]*$//' file ... > perl -pi -e 's/^\s*(\S.*\S)[ \t]*$/$1/' file ... > > The first one seems more straightforward to me most of the time, > but there are times I find Perl's `-pi -e ...' idiom very convenient. > It is, and I wish to acknowledge the above are entirely valid solutions to the problem, but... python -c 'import sys; print sys.stdin.read().strip()' < file... ...has the advantage of being human readable. My old 300-baud accoustic modem used to generate output which in hindsight looks astonishingly close to regex character classes. :-) -- -Chuck
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