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Re: ===, =:=, ~~, eq and == revisited (blame ajs!) -- Explained

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Darren Duncan
July 14, 2006 13:18
Re: ===, =:=, ~~, eq and == revisited (blame ajs!) -- Explained
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At 12:55 PM -0700 7/14/06, Larry Wall wrote:
>On Thu, Jul 13, 2006 at 10:56:59PM -0700, Darren Duncan wrote (edited):
>: Now, I didn't see them yet anywhere in Synopsis 3, but I strongly
>: recommend having negated versions of all these various types of
>: equality tests.  Eg, !=== for ===, !eqv for eqv, etc.  They would be
>: used very frequently, I believe (and I have even tried to do so), and
>: of course we get the nice parity.
>My gut feeling contradicts yours--I think these are going to be far
>rarer in practice than == and eq, so they don't warrant yet more
>special forms that have to be memorized.

Actually, now that I think about it, I could use 'not' to avoid a lot 
of the syntactic hassle that I've been having with a lack of !===. 
Eg, what I wanted was to avoid having to say:

   if (!($foo === $bar) and ...) { ... }

So I had proposed instead:

   if ($foo !=== $bar and ...) { ... }

But then your post reminded me of 'not', and since it binds tighter 
than 'and' and 'or', I can say:

   if (not $foo === $bar and ...) { ... }

While I still like the second example best, in light of the issues of 
not-raising you mention that could confuse others, I'll withdraw my 
request for now.

-- Darren Duncan

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