To return the character that's used as the delimiter in a quote-like operator, you can use a backslash. 
'/' eq q/\// or die "Failed";

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Your task is to return a backslash using a backslash as the delimiter. Use qq\\ for level easy, use q\\ for level guru.

<Reveal this spoiler or all in this thread>
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to The Backslash Challenge by choroba

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