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  1. or download this
    #!/usr/local/bin/perl
    use strict;
    use warnings;
    ...
        "Global" => sub { "Perl is cool" =~ m/Perl/g }
        }
    );
    
  2. or download this
                    Rate     Global Non-global
    Global     1351351/s         --        -9%
    Non-global 1492537/s        10%         --
    
  3. or download this
    s/
        (                                           # Match and backrefere
    +nce to either
    ...
            "I don't know $1 very well"             # or this when java is
    + found
        :"I do not wish to consider $1"             # or this when somethi
    +ng else is found.
    /ex;