Re: Firefox changed IFRAME behaviour - I need a remedy??

Newsgroups	comp.lang.javascript
Date	2019-08-02 15:57 -0700
References	(3 earlier) <0d372bee-66f1-4aa6-9b15-2b802c70c1a6@googlegroups.com> <qhsf8d$bni$1@gioia.aioe.org> <4a0f55db-a21c-4fb1-aec3-e678e40b41e0@googlegroups.com> <qi17be$vfo$1@gioia.aioe.org> <31423186-83d0-46fa-b6c9-48afc04d470f@googlegroups.com>
Message-ID	<32aa4e0f-2a8d-4722-a805-974dc493740e@googlegroups.com> (permalink)
Subject	Re: Firefox changed IFRAME behaviour - I need a remedy??
From	"Michael Haufe (TNO)" <tno@thenewobjective.com>

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On Friday, August 2, 2019 at 7:59:50 AM UTC-5, dr.j.r...@gmail.com wrote:

> And that was my *first* thought on seeing   new Set   in Michael's
> code.  Google for   set   gives about 13,250,000,000 results; but
> Google for   new set   gives about 11,590,000,000 results, of which
> the first looks almost ideal - and Google for "new set" gives a mere
> 45,400,000 results, of which the first looks even better.   <g>

For JavaScript and Web Development information, the Mozilla wiki (MDN) [1] is the accepted [2] portal for reference.

In this instance: <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set>

> I use an Object as a Set, and don't need the additional properties
> of a Set.

If you want a set, use a Set. Semantics matter. All elements of a set must support an equality test. Using an object you can't do this as you are forced to represent every member as a string. Example:

<script>
var fakeSet = Object.create(null)

fakeSet[undefined] = true
fakeSet['undefined'] = true

fakeSet[undefined] === fakeSet['undefined'] // true

</script>

undefined !== 'undefined' but due to the implicit string conversion you cannot accomplish this. For non-primitive objects you have to override the toString method to return the equivalent of a hash to make sure the items are stored. 

Using a proper Set, this is not an issue.

[1] <https://developer.mozilla.org>
[2] <https://www.bleepingcomputer.com/news/technology/browser-makers-agree-to-move-web-documentation-to-mozillas-portal/>

Thread

Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-20 12:53 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? Andrew Poulos <ap_prog@hotmail.com> - 2019-07-21 15:15 +1000
  Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-22 03:07 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? Martin Honnen <martin.honnen@gmx.de> - 2019-07-22 16:20 +0200
    Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-30 08:20 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-30 18:24 -0700
    Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-31 04:14 -0700
      Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-31 05:32 -0700
        Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-07-31 18:22 +0200
          Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 02:37 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-02 13:38 +0200
              Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 05:59 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-02 17:55 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:57 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 06:11 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:44 +0200
              Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:10 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-03 08:59 +0200
                OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 05:18 -0700
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-03 15:27 +0200
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 09:28 -0700
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-04 12:32 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:30 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-04 15:31 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-05 13:48 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-05 16:51 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-07 01:42 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-07 01:47 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-08 20:56 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-08 13:16 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-08-08 23:57 -0600
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-09 12:48 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-05 06:37 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? John G Harris <niam@jghnorth.org.uk.invalid> - 2019-08-05 18:46 +0100
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-06 03:39 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-05 17:30 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:05 -0700
      Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-31 18:58 -0700
        Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 05:01 -0700
          Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 16:07 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 08:19 -0700
              Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-03 18:42 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:27 +0200

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