if what you are trying to do is change 'M' for the string 'U+1E43' you
can try using a hash:
%table = ( M => 'U+1E43'); # or maybe ( M => "\x{1E43}")
$string =~ s<
{(.*?)}
> <
'{'.(join '', map { $table{$_} || $_ } split //, $1).'}';
>exg;
or you can try anything else, the point is that using the /e modifier
with s/// you can use any piece of code that works for you as the
replacement of the substitution
Marco Antonio Valenzuela Escárcega
On Mon, 2002-07-08 at 20:14, David Carpenter wrote:
> Thanks to all those who responded to my original post. I posted the
> clarifcation below as a reply to the original thread, but I think it was
> lost in the shuffle.
>
> I think I failed to make something clear. What I need is to selectively
> replace only
> certain characters when they appear in a string within brackets. I don't
> need to transform the string as a whole. So if I
> have:
>
> Don't Match the capital M unless {the M is inside brackets} then Match it
>
> I need to be able to change the M inside the brackets in such a way that the
> entire line is output, but with, in this case, the single change that the
> one M within the brackets has been changed to another character, say an X,
> so that the line would now read:
>
> Don't Match the capital M unless {the X is inside brackets} then Match it
>
> I need to process a very large file (c. 20MB) in this way, and there are
> about a dozen
> different single characters what would have to be systematically changed to
> an alternative character. Actually, what I want to do is change the M, for
> instance, to the Unicode character U+1E43. I've been able to apply these
> changes to the file as a whole, but don't know how to apply them only to
> certain characters that appear in text within brackets.
>
> I was assuming (wrongly?) that I would have to set up some kind of loop to
> run through each string within brackets to test for the M (and a number of
> other characters) and change it to the U+1E43 (an a number of other Unicode
> characters) if found. Can I do all this just using regular expressions with
> s/// or tr///?
>
> I hope this is more clear. Thanks again to everyone who has offered help..
> I'm learning a lot about regular expressions! (or at least I'm trying to!)
>
> David
>
>
>
>
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