Better solution: 

my %seen;
my @uniqWebCustomers = grep !$seen{$_}++, @webCustomers;

[download]

Better yet: 

use List::Util qw( uniq );

my @uniqWebCustomers = uniq @webCustomers;

[download]

In reply to Re: Fixing: Experimental keys on scalar is now forbidden by ikegami
in thread Fixing: Experimental keys on scalar is now forbidden by TheVend

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