>> I've never saw a saw saw a saw
>> I just want to replace the 2nd or 3rd "saw", Do you have any idea?
>
> Not beautiful solution to replace 3rd "saw" to "seen":
> s/^\(.\{-}saw.\{-}saw.\{-}\)\(saw\)/\1seen/
Though not beautiful, it's easy to do, and even easier with the
command-line window where you can paste the same regexp piece
multiple times. You can yank the ".\{-}saw", and then paste it
as many times as you need.
I frequently do something similar with tab-delimited files, using
something like
s/^\%([^\t]*\t\)\{4}\zsvalue_in_col_5/replacement/
to search a given column (column-5 in this case), and do
replacements at that given point.
The above finds \{4} "non-tab stuff [^\t]* followed by a tab \t"
matches grouped-but-not-tagged with \%(...), then starting at
this location \zs, perform my actual value_in_col_5 -> replacement.
-tim
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