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I need a regular expression for replacing each character in a text
with an X.

For example,

ASASasdfdfDFDFDFDFAAAAAAAAAAAAAAAAAAAAAAABNNBMBMBM BMBBNBJFFFJFFHFFJFJFJJFJFJFJFJFJFJFJFWEWEW

is the initial string i want to replace the 12 A's followed by
something with X's

something like AAAAAAAAAAAAAAAA.* to be replaced by an equal number of
X's

so output should be

ASASasdfdfDFDFDFDFXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Thanx for ur help.

"psk" <> wrote in message
news: om...
> I need a regular expression for replacing each character in a text
> with an X.
>
> For example,
>
>
ASASasdfdfDFDFDFDFAAAAAAAAAAAAAAAAAAAAAAABNNBMBMBM BMBBNBJFFFJFFHFFJFJFJJFJFJ
FJFJFJFJFJFWEWEW
>
> is the initial string i want to replace the 12 A's followed by
> something with X's
>
> something like AAAAAAAAAAAAAAAA.* to be replaced by an equal number of
> X's
>
> so output should be
>
>
ASASasdfdfDFDFDFDFXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX

how about:
$_ =
'ASASasdfdfDFDFDFDFAAAAAAAAAAAAAAAAAAAAAAABNNBMBMB MBMBBNBJFFFJFFHFFJFJFJJFJF
JFJFJFJFJFJFWEWEW';

s/(A{12}.*)/"X" x length $1/e;