Re: "i = i|0"

From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript, comp.lang.c
Subject	Re: "i = i\|0"
Followup-To	comp.lang.javascript
Date	2014-06-12 16:54 +0200
Organization	PointedEars Software (PES)
Message-ID	<1526442.ILQBFeAYIF@PointedEars.de> (permalink)
References	(4 earlier) <5398CC30.9020706@verizon.net> <2078529.Slc7CH7YZo@PointedEars.de> <lnc5s2$df8$1@dont-email.me> <2122350.lP4zVSTnZj@PointedEars.de> <Ruimv.411542$Sp6.361895@fx15.am4>

Cross-posted to 2 groups.

Followups directed to: comp.lang.javascript

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[F'up2 comp.lang.javascript]

BartC wrote in comp.lang.javascript, comp.lang.c:

> "Thomas 'PointedEars' Lahn" <PointedEars@web.de> wrote in message
> news:2122350.lP4zVSTnZj@PointedEars.de...

It's attribution *line*, _not_ attribution novel.

>> [F'up2 comp.lang.javascript]

Why have you ignored that?  This discussion has nothing to do with C 
(anymore).

>> James Kuyper wrote in comp.lang.c:
>>> but for this particular C expert, the very existence of
>>> comp.lang.javascript seems to contradict the most obvious meaning for
>>> that
>> 
>> so), and the newsgroup name is case-insensitive as newsgroup names
>> usually go.  (You would not talk about “c” either, would you?)
> 
> "c" by itself is ambiguous. "javascript" considerably less so; even
> without context, people will know what you were on about (ie. the language
> formerly known as Javascript).

So those “people” are adopting a new term for a non-existing language that 
is thought to be a successor to some other non-existing language?

(You have no clue what you are talking about.  Visit the ECMAScript Support 
Matrix website to get a minimum one.)
 
>>  function f(i) {
>>    i = i|0;
>>    return (i + 1)|0;
>>  }
>> […]
> 
> If that function is being called as a=f(b), then another optimisation
> might be:
> 
>  a = b+1;
> 
> if the function source is visible at the call-site (especially if being
> converted from c source code).

No, as that would change the semantics considerably.  I also think inlining 
was not what was being asked for here; it is too obvious.
 
> But, how important is that |0 anyway; what would happen if the function
> was just:
> 
> function f(i) }
>   return i+1;
> } ?

Then the value of the “i” parameter would not necessarily be a numeric value 
whose fractional part is zero, neither would be the return value.
 
> (I assume that in this language, it is possible to write such a function,
> but would anyone actually bother with sticking |0 everywhere? If called
> with an invalid argument, it would still fail wouldn't it?)

What is “this language”?

Your questions have been answered before.  Please read more carefully.
 
-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix>
Please do not Cc: me. / Bitte keine Kopien per E-Mail.

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Thread

Re: "i = i|0" Ike Naar <ike@iceland.freeshell.org> - 2014-06-11 21:09 +0000
  Re: "i = i|0" James Kuyper <jameskuyper@verizon.net> - 2014-06-11 17:37 -0400
    Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 00:56 +0200
      Re: "i = i|0" raltbos@xs4all.nl (Richard Bos) - 2014-06-12 11:41 +0000
        Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 14:28 +0200
      Re: "i = i|0" James Kuyper <jameskuyper@verizon.net> - 2014-06-12 08:19 -0400
        Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 14:45 +0200
          Re: "i = i|0" James Kuyper <jameskuyper@verizon.net> - 2014-06-12 09:25 -0400
            Re: "i = i|0" raltbos@xs4all.nl (Richard Bos) - 2014-06-12 14:50 +0000
              Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 16:55 +0200
                Re: "i = i|0" Keith Thompson <kst-u@mib.org> - 2014-06-12 11:28 -0700
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 20:46 +0200
                Re: "i = i|0" Christoph Michael Becker <cmbecker69@arcor.de> - 2014-06-12 20:58 +0200
                Re: "i = i|0" Kaz Kylheku <kaz@kylheku.com> - 2014-06-12 19:20 +0000
                Re: "i = i|0" Christoph Michael Becker <cmbecker69@arcor.de> - 2014-06-12 22:13 +0200
                Re: "i = i|0" Kaz Kylheku <kaz@kylheku.com> - 2014-06-12 21:15 +0000
                Re: "i = i|0" Christoph Michael Becker <cmbecker69@arcor.de> - 2014-06-12 23:59 +0200
                Re: "i = i|0" Christoph Michael Becker <cmbecker69@arcor.de> - 2014-06-13 01:10 +0200
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-13 01:52 +0200
                ECMAScript standards (was: "i = i|0") Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-15 12:53 +0200
                Re: "i = i|0" Stephen Sprunk <stephen@sprunk.org> - 2014-06-12 17:11 -0500
                Re: "i = i|0" Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-12 22:40 +0000
                Re: "i = i|0" glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-06-12 22:44 +0000
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-13 01:16 +0200
                Re: "i = i|0" raltbos@xs4all.nl (Richard Bos) - 2014-06-16 12:55 +0000
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-16 22:44 +0200
                Re: "i = i|0" Thomas Richter <thor@math.tu-berlin.de> - 2014-06-13 19:16 +0200
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-13 19:21 +0200
                Re: "i = i|0" Tim Streater <timstreater@greenbee.net> - 2014-06-13 18:24 +0100
                Re: "i = i|0" Kaz Kylheku <kaz@kylheku.com> - 2014-06-13 21:25 +0000
            Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 17:13 +0200
              Re: "i = i|0" raltbos@xs4all.nl (Richard Bos) - 2014-06-12 15:20 +0000
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 17:32 +0200
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-17 12:30 +0200
              Re: "i = i|0" James Kuyper <jameskuyper@verizon.net> - 2014-06-12 12:17 -0400
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 20:01 +0200
                Re: "i = i|0" James Kuyper <jameskuyper@verizon.net> - 2014-06-12 16:13 -0400
                Re: "i = i|0" glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-06-12 20:44 +0000
                Re: "i = i|0" Kaz Kylheku <kaz@kylheku.com> - 2014-06-12 20:59 +0000
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-13 01:22 +0200
                Re: "i = i|0" Martin Shobe <martin.shobe@yahoo.com> - 2014-06-12 19:48 -0500
                Re: "i = i|0" "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2014-06-12 18:32 -0700
                Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-13 12:12 +0200
                Re: "i = i|0" John Harris <niam@jghnorth.org.uk.invalid> - 2014-06-13 10:16 +0100
                Re: "i = i|0" Tim Streater <timstreater@greenbee.net> - 2014-06-13 11:44 +0100
          Re: "i = i|0" "BartC" <bc@freeuk.com> - 2014-06-12 15:06 +0100
            Re: "i = i|0" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-12 16:54 +0200

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