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  1. or download this
    #! /usr/bin/perl
use warnings;
use strict;
...

my $re = qr/^-{1,}\z/;
print $json->encode([$re]), "\n";
  2. or download this
    {   no strict 'refs';
    local *{'Regexp::TO_JSON'} = sub { "" . shift };
    print $json->encode($re), "\n";
}
  3. or download this
    ($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,