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Re: Modify Element Tag Question

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Dr J R Stockton wrote on 19 mei 2012 in comp.lang.javascript:

> In comp.lang.javascript message
> <60e864d1-ef34-4b1d-924e-5a8ec62c849a@3g 2000vbx.googlegroups.com>,
> Thu, 17 May 2012 18:48:05, Scott Sauyet <scott.sauyet@gmail.com>
> posted: 
> 
>>The page Mel supplied included a fair bit of sensitive customer data,
>>which, I assume is why he hasn't posted simpler versions anywhere.
>>But there is nothing sensitive about the sorting routines, and they
>>are simple and appropriate:
>>
>>    function cmpNameAsc(x, y) {
>>      if (x.mem === y.mem) return 0;
>>      return (x.mem > y.mem) ? 1 : -1;
>>    }

No reason for prohibiting typeconversion with ===,
or is this a speed issue?

if the === false and the == is true, 
you would end up with returning -1,
not so useful.

> I think, supported by very brief testing, that it would be better to
> do 
>a > test and return +1, else do a < test and return -1; else return 0.
> That is on the assumption that equality is rare.
> 
> The code shown will almost half of the time do one comparison, whereas
> comparing first with 0 will almost always do two comparisons.
> 
> The difference made to the overall time will be small but possibly
> measurable; and it may be browser-dependent.


function cmpNameAsc(x, y) {
     return (x.mem > y.mem) ? 1 : (x.mem < y.mem) -1 : 0;
};

This way it looks nicer to me,
would it be even faster?


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Thread

Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-11 13:42 -0600
  Re: Modify Element Tag Question Martin Honnen <mahotrash@yahoo.de> - 2012-05-12 12:00 +0200
    Re: Modify Element Tag Question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-12 15:02 +0200
      Re: Modify Element Tag Question John G Harris <john@nospam.demon.co.uk> - 2012-05-12 16:15 +0100
        Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-12 14:32 -0600
  Re: Modify Element Tag Question Dr J R Stockton <reply1219@merlyn.demon.co.uk.not.invalid> - 2012-05-12 19:29 +0100
    Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-12 18:08 -0600
      Re: Modify Element Tag Question "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-05-13 08:11 +0000
    Re: Modify Element Tag Question Martin Honnen <mahotrash@yahoo.de> - 2012-05-13 11:25 +0200
      Re: Modify Element Tag Question Dr J R Stockton <reply1220@merlyn.demon.co.uk.not.invalid> - 2012-05-14 20:19 +0100
  Re: Modify Element Tag Question Denis McMahon <denismfmcmahon@gmail.com> - 2012-05-13 02:59 +0000
    Re: Modify Element Tag Question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-13 15:50 +0200
      Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-13 08:56 -0600
      Re: Modify Element Tag Question Dr J R Stockton <reply1219@merlyn.demon.co.uk.not.invalid> - 2012-05-14 20:01 +0100
    Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-13 09:00 -0600
      Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-14 08:45 -0600
        Re: Modify Element Tag Question Scott Sauyet <scott.sauyet@gmail.com> - 2012-05-14 16:31 -0700
          Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-15 09:03 -0600
        Re: Modify Element Tag Question Dr J R Stockton <reply1220@merlyn.demon.co.uk.not.invalid> - 2012-05-15 20:04 +0100
          Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-15 22:19 -0600
            Re: Modify Element Tag Question Dr J R Stockton <reply1220@merlyn.demon.co.uk.not.invalid> - 2012-05-17 19:13 +0100
              Re: Modify Element Tag Question Scott Sauyet <scott.sauyet@gmail.com> - 2012-05-17 18:48 -0700
                Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-18 13:14 -0600
                Re: Modify Element Tag Question Dr J R Stockton <reply1220@merlyn.demon.co.uk.not.invalid> - 2012-05-19 20:47 +0100
                Re: Modify Element Tag Question "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-05-20 08:31 +0000
                Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-20 18:25 -0600
                Re: Modify Element Tag Question "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-05-21 16:06 +0000
                Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-21 13:24 -0600
                Re: Modify Element Tag Question "Mel Smith" <med_cutout_syntel@aol.com> - 2012-05-21 13:34 -0600
                Re: Modify Element Tag Question Scott Sauyet <scott.sauyet@gmail.com> - 2012-05-21 13:09 -0700
                Re: Modify Element Tag Question Dr J R Stockton <reply1221@merlyn.demon.co.uk.not.invalid> - 2012-05-21 20:33 +0100

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