Re: systematic replacement of text

On Wednesday, April 9, 2014 2:09:05 PM UTC+4, natercia wrote:
> Hi,
>
>
>
> In a file with many occurrences of something like this:
>
>
>
> \xxx{a variable number of words that I want to delete}{a variable (diferent)
>
> number of words that I want to keep}
>
>
>
> I would like to eliminate at once in all occurrences in the file the following:
>
> \xxx
>
> the two pairs of {}
>
> the content of the first {} independently of its size (which can be different
>
> from occurrence to occurrence)
>
>
>
> That is, I want to keep only the content of the second pair of {} above.
>
> In this case, I would like to obtain:
>
> a variable (diferent) number of words that I want to keep
>
>
>
> \xxx{argument 1}{argument 2} can exist more than once in a line, but never
>
> will exist a \xxx in the arguments of another \xxx.
>
>
>
> If "argument 1" and "argument 2" were kept in all occurrences, I could solve
>
> my problem with something like this:
>
> :1,$ s/\\xxx{argument 1}{argument 2}/argument 2/g
>
> but my problem is that argument 1 and argument 2 are different from occurrence
>
> to occurrence.
>
> Don't know if this info is needed or not: both argument 1 and/or argument 2
>
> can contain the symbols \ {}.
>
>
>
> Can someone help me?
>
>
>
> Thank you very much,
>
> Natércia

sometimes it's better to use sed or awk

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