On 06/07/09 09:44, Jürgen Krämer wrote:
>
>
> Hi,
>
> Jeri Raye wrote:
>>
>> Can you use the position of a word in a search and replace as an argument
>>
>> For example
>>
>> if the line has the word INPUT in it, then the last word should have
>> () around it
>>
>> So:
>>
>> start: INPUT s1 , s2
>> INPUT s3 , s4
>>
>> must become
>>
>> start: INPUT s1 , (s2)
>> INPUT s3 , (s4)
>
> g/\<INPUT\>/s/\(.*\)\(\<\w\+\>\)/\1(\2)/
>
> or
>
> g/\<INPUT\>/s/.*\zs\(\<\w\+\>\)/(\1)/
>
> do this. The :global-command restricts the following substitution to
> lines containing the word INPUT. The :substitute-commands first try to
> match as many characters as possible in a line, but then they backtrack
> to be able to match the right-most single word. The first command then
> replaces everything that was matched with the part before the word and
> the word itself in parentheses. The second command uses \zs to reset the
> start of the match and replaces only the word with itself in parentheses.
>
> Regards,
> Jürgen
>
The OP's request sounds like school homework, so I'd recommend to read
:help :s
:help :g
:help pattern-overview
and what comes before and after them.
Just this time, to show that Vim solutions are rarely unique, I'll
propose another solution (untested):
:g/\<INPUT\>/s/\w\+\ze\W*$/(\0)
This ought to replace, on lines containing the word INPUT, as many
word-characters as possible by the same thing in parentheses, but only
if followed by nothing else than zero or more non-word characters till
the end of the line. (\zs and \ze mark the start and end of what should
be replaced -- very handy).
Note that both Jürgen's solution and mine will replace a line consisting
only of the word INPUT by (INPUT) -- if you want not to replace in that
case, well, it's doable: "the solution is left as an exercise to the
reader".
Best regards,
Tony.
--
XIIdigitation, n.:
The practice of trying to determine the year a movie was made
by deciphering the Roman numerals at the end of the credits.
-- Rich Hall, "Sniglets"
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