🚀 go-pugleaf

> Lawrence's microEmacs v3.8 has some regular-expression capability.  I don't
> know how to search for a pattern _and_then_replace_part_of_it_ (without
> trashing the entire pattern), but this may reflect my lack of skills with
> regular expressions.  (I can't manage this in vi, either.)

This is off of the original topic, but probably worth answering anyway...

To replace part of a regular expression from within VI you must
use parethesized regular expressions.  For example.  If you
want to search for "foo bar", but only want to replace "bar" with
"BAR", you can do the following:

	:sub/\(foo \)\(bar\)/\1BAR/

You can also do:

	:sub/\(foo \)\(bar\)/\1\U\2/

Note that \1 and \2 in the substitution portion provides the text which
matched the the Nth subexpression.  \U turns on conversion to upper-case.
Unfortunately, there aren't many VI manuals which talk about all you
can do with regular expressions (of course PC/VI's does! :-) )

Joe Boykin
Custom Software Systems
{necntc, frog}!custom!boykin