David Carpenter wrote:
>
> This is a list for beginners, right? So perhaps no one will be too annoyed
> if I ask what is probably a really stupid question . . .
>
> I have a text file with occasional strings enclosed in braces:
> kdkdkiwiwdkdkdk {iwidkwidkw} kdkdkdwiwiwkdkdk . . .
>
> I would like to use tr/// to modify the characters within the braces, while
> leaving the rest of the file unchanged. Whlie I'm sure this is a staight
> forward procedure, I've tried a number of loops and can't get it to work.
> If anyone could point a beginner in the right direction, he'd appreciate it.
Something like this for example:
while ( <FILE> ) {
s[
{ # match beginning brace
(.*?) # store non-greedy match in $1
} # match ending brace
][
( $a = $1 ) =~ # can't modify $1
tr/a-zA-Z/n-za-mN-ZA-M/; # do rot13 on match
$a # use the results in substitution
]xe; # x for whitespace and comments
# e to run the tr///
} # end of while loop
John
--
use Perl;
program
fulfillment
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