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Message-ID: <2749906.Zugg1RVdLx@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <usenet@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Fri, 24 May 2013 21:56:22 +0200
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Subject: Re: !0 versus true
Newsgroups: comp.lang.javascript
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Daniel Pitts wrote:

> On 5/23/13 8:53 AM, Thomas 'PointedEars' Lahn wrote:
>> Andrew Poulos wrote:
>>> [true minized to !0]
>>
>> They should reconsider their approach as they are exchanging a minor
>> increase in loading performance against a probably larger reduction of
>> runtime performance, adding an operation (“!”) where there does not have
>> to be one, just for the sake of two octets less per occurrence (“!0” vs.
>> “true”).
>>
>> They should ask themselves instead why there were so many occurrences of
>> ”true” in the code in the first place.  If I wrote a minimizer, *that* is
>> where I would look first.  For example,
>>
>>    if (x == true)
>>
>> and
>>
>>    if (true == x)
>>
>> can be minimized to the equivalent, shorter, more efficient
>>
>>    if (x)
> 
> Yes, but if (x === true) can not be reduced to if (x).

Which is precisely why nobody suggested that.
 
> Also, perhaps you're returning true after doing something that succeeded:
> 
> if (flibber()) { flub(); return true; }
> if (flabber()) { noFlub(); return false; }
> 
> In these cases, reducing true and false to !0 and !!0 might make sense.

It does not, for the reasons I have already given.  In particular your 
latter suggestion is utter nonsense, adding *yet* *another* operation where 
does not have to be one (false === !1).

-- 
PointedEars

Twitter: @PointedEars2
Please do not Cc: me. / Bitte keine Kopien per E-Mail.