No, you don't need the +: 
    print map {"$_",}, qw/foo bar/

[download]
works as well, although you need more characters. I don't think there is any case in Perl where you need unary minus for disambiguation where you can't disambiguate in another way using 2 or 3 other keystrokes.

Unary plus is just a convenience, not a requirement.

In reply to Re^4: Perl oddities by Anonymous Monk
in thread Perl oddities by brian_d_foy

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