Re: Inchworm vs scalar: on boolean false value

~ is a binary operation not a Boolean, IIRC.

If you want Boolean results use !! instead.

Uhm ... I think it might not do what you think it does.

Binary "~~" does a smartmatch between its arguments.

Better run B::Deparse to understand what the parser sees.

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery
FootballPerl is like chess, only without the dice}

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Re^2: Inchworm vs scalar: on boolean false value by Fletch (Bishop) on Dec 17, 2019 at 14:32 UTC
Link to what he's using in perlsecret. Interestingly enough Deparse doesn't get much to work with (looks like the constant values generated are what's available; 5.26.1 using `-MO=Deparse,-p,-q`) `BEGIN { $/ = "\n"; $\ = "\n"; } use strict; use warnings; map({print((('[' . $_) . ']'));} scalar((!1)), '', 0, 0);` [download] The cake is a lie. The cake is a lie. The cake is a lie.	[reply] [d/l] [select]
Re^2: Inchworm vs scalar: on boolean false value by Eily (Monsignor) on Dec 17, 2019 at 14:30 UTC
Binary "~~" does a smartmatch between its arguments. Here it's the unary ~~ though (or rather, two unary ~ in a row), because of the commas, the same way that `A, -B` is a list of two values, not the difference between the list (A,) and the scalar B.	[reply] [d/l]
Re^3: Inchworm vs scalar: on boolean false value by LanX (Saint) on Dec 17, 2019 at 15:59 UTC
It looked unary for me too, but I'd rather prefer being sure. That's why I mentioned Deparse. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]