As it circumvents prototypes, it doesn't use $_ when no arguments are specified.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re^4: Spotting an empty array as argument by choroba
in thread Spotting an empty array as argument by Chuma

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