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    use 5.010;  # need perl 5.10+ regex enhancements -- (?|alts)
    
    ...
            ;
    
        }
    
  2. or download this
    c:\@Work\Perl\monks\justrajdeep>perl extract_binary_nums_1.pl
    matched '10' at offset 0; is integer
    matched '101' at offset 3; is integer
    matched '110.11010110' at offset 7; is real
    matched '101.010E-01' at offset 24; is exponential