Simply use m//g: 

my $fname = '41084109.udp';

@filename_parts = $fname =~ /(.{1,4})/g;

[download]

In reply to Re: How can I split a string into fixed-length parts, rather than on delimiters? by almut
in thread How can I split a string into fixed-length parts, rather than on delimiters? by ruyler

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