I dislike "cute" uses of fat arrow, because the following code is broken:
use constant COMMA => ',';
my $result = join COMMA => @list;
# should be: my $result = join COMMA, @list;
Yes, smart people know that fat arrow autoquotes the left argument. But why should you require your code to be maintained by smart people?
Be kind to your maintenance programmer. Don't use fat arrow except when you want the quoting feature.
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