[TAG] Filters

[Ben Okopnik]

On Sat, Apr 17, 2004 at 12:01:12AM +0100, Jimmy O'Regan wrote:
> During my 6 months without 'net access I read quite a lot of books, 
> including Trainspotting, and thought it'd be fun to write a filter.
> 
> ===== CUT HERE: trainspotting.sed.txt =====
> s/ of / ay /g
> s/ off/ oaf/g
> s/ I / ah /g

Nice. However, you should run a filter over your filters:

sed 's#/ #/\\b#1;s# /#\\b/#1;s/ //g' trainspotting.sed.txt

or something similar, anyway. :) The reason is that (for, e.g., the
first expression) an 'of' at the beginning or the end of a line will be
ignored - there's no space before it at BOL, and none after it at EOL.
'\b' is a word boundary, which will do the right thing. 


* Ben Okopnik * okopnik.freeshell.org * Technical Editor, Linux Gazette *
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