Re: unhead

"Randal L. Schwartz" wrote: 
> Well, it also presumes that "!" returns literally 0 and 1.  I've
> never seen a promise of that in any docs.

Well, I've seen a promise of it in one of your books. :-)
Perhaps it doesn't count as official docs, but the 2nd edition of the
Camel by Larry Wall, Tom Christiansen and _Randal L. Schwartz_ states
in the "Ideographic Unary Operators" section on page 80:

"Unary ! performs logical negation, that is, "not". See also not for
a lower precedence version of this. The value of a negated operation
is 1 if the operand is false (numeric 0, string "0", null string, or
undefined); otherwise, the value is that of the null string."

/-\


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