You can also try this:
use Tie::File;
tie @array, 'Tie::File', "./text_file";

foreach (@array){
     tr/[a-zA-Z]/[A-Za-z]/;
}
untie @array;

[download]
Enjoy,
Mickey

In reply to Re: uppercase/lowercase in a single expression by mickeyn
in thread uppercase/lowercase in a single expression by greatshots

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