OK, let's try to make it as silly as possible:
my $s = 'A3xyz45M98AB7Z9';

($t=join'',map{/\d+/g?$_.=':':$_}split//,$s)=~s/:(\d+|$)/$1/g;

print $t;

[download]
Now I'm looking for an even worse way to achieve it :)

In reply to Re: Best way to put : between fields in a string by wazoox
in thread Best way to put : between fields in a string by eyepopslikeamosquito

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