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### Re^5: Efficient way to replace a set of values with another set of values

by AnomalousMonk (Chancellor)
 on Nov 23, 2012 at 22:58 UTC ( #1005323=note: print w/replies, xml ) Need Help??

... until you get to "27. This is a really long list!".

Maybe something like (and 'zz' could easily be 'zzz'):

```>perl -wMstrict -e
"my @lines = (
'1. This is just a sample.',
'2. This is to check',
'3. How a set of values',
'4. can be replaced by another',
'5. set of values and that too',
'6. in the most efficient way.',
'99. And also handle large numbers.',
'999. Oops, too big!',
'99 bottles of beer on the wall does not translate!',
);
;;
my %xlate;
{ my @alphas = (undef, 'a' .. 'zz');
@xlate{ 1 .. \$#alphas } = @alphas[ 1 .. \$#alphas ];
}
;;
s{ \A (\d+) (?= [.]) }
{ exists \$xlate{\$1}
? \$xlate{\$1} : (warn(qq{bad '\$1' in '\$_'}), '??')
}xmse
for @lines;
;;
print qq{\$_\n} for @lines;
"
bad '999' in '999. Oops, too big!' at -e line 1.
a. This is just a sample.
b. This is to check
c. How a set of values
d. can be replaced by another
e. set of values and that too
f. in the most efficient way.
cu. And also handle large numbers.
??. Oops, too big!
99 bottles of beer on the wall does not translate!
• Comment on Re^5: Efficient way to replace a set of values with another set of values

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