Re: Case-preserving substitutions

You need the /e modifier to cause the right side interpolation of the variable:

s/\b($old)\b/(lcfirst($1) eq $1) ? lcfirst($new) : ucfirst($new)/gei;

Consult perlman:perlre for more details.

Update:
I think I may have mis-interpreted the question. It has been since corrected, and the difference turned out to be slight.

[giulienk]

Update: by the time i posted this, jryan updated his post correctly :)

You also need the "i" modifier in the end, to match case-insensitive way.


$|=$_="1g2i1u1l2i4e2n0k",map{print"\7",chop;select$,,$,,$,,$_/7}m{..}g