Dear perlmonks,
Sorry for my English.
I would like to hear your opinions about solution of following problem. I have some numbers and templates (like No-###-#####-#######) and I need to format this numbers according to the templates: change symbol '#' on digits of number. I created following function: 
sub format_number {
    die 'Usage:format_number(<number>, <format>)!' unless scalar(@_) =
+= 2;
    
         my ($num, $format)  = @_;
    
         my @form = split('', $format);
         @form = reverse @form;
         my @num  = split('', $num);
         my ($symbol, @res);
         foreach(@form) {
             if(/^([Xx]|#)$/) {
                 unless($symbol = pop @num) {
                     $symbol = 0;
                 }
             } else {
                 $symbol = $_;
             }
    
             unshift @res, $symbol
         }
    
         return join('', @res);
     }

[download]
But I think that it's brute-force approach. Maybe somebody knows more elegant solution. I will be very grateful for your help.
Thanks.

In reply to Format of number by template by nite_man

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