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Groups > comp.lang.javascript > #37265
| From | Arno Welzel <usenet@arnowelzel.de> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Object equals other object |
| Date | 2019-09-16 11:49 +0200 |
| Message-ID | <gu945rFgkqgU1@mid.individual.net> (permalink) |
| References | <Z4edne0EI5e3auPAnZ2dnUU7-dPNnZ2d@westnet.com.au> <XnsAACC5BADA63FDeejj99@194.109.6.166> <RMadnQGkRsK51eLAnZ2dnUU7-I3NnZ2d@westnet.com.au> |
On 16.09.19 10:30, Andrew Poulos wrote:
> On 16/09/2019 5:00 pm, Evertjan. wrote:
>> Andrew Poulos <ap_prog@hotmail.com> wrote on 16 Sep 2019 in
>> comp.lang.javascript:
>>
>>> If I have
>>>
>>> let a = { "c": 1 },
>>> b = { "c": 1 };
>>>
>>> then
>>>
>>> console.log(a === b); // false.
>>>
>>> My question is, why was it decided that JavaScript is to return false
>>> even if the two objects have the same number of properties, all the
>>> properties are named the same, and all the properties values are
>>> identical?
>>
>> Two DIFFERENT objects can never "be" the same.
>
> Yes, but why can't two objects that have exactly the same properties and
> corresponding property values be considered the same? If I JSON
> stringify both of them then they magically become the same, so why not
> before?
Because "===" does not convert object properties to a value for comparison.
"a === b" is only true if a and b are exactly same thing and not just
the same value after some conversion.
If you only want to compare values, use "==".
--
Arno Welzel
https://arnowelzel.de
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Object equals other object Andrew Poulos <ap_prog@hotmail.com> - 2019-09-16 12:44 +1000
Re: Object equals other object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-09-16 09:00 +0200
Re: Object equals other object Andrew Poulos <ap_prog@hotmail.com> - 2019-09-16 18:30 +1000
Re: Object equals other object Julio Di Egidio <julio@diegidio.name> - 2019-09-16 02:01 -0700
Re: Object equals other object Andrew Poulos <ap_prog@hotmail.com> - 2019-09-16 19:39 +1000
Re: Object equals other object John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-16 18:29 +0100
Re: Object equals other object John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-16 10:04 +0100
Re: Object equals other object Julio Di Egidio <julio@diegidio.name> - 2019-09-16 02:21 -0700
Re: Object equals other object John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-16 18:39 +0100
Re: Object equals other object Arno Welzel <usenet@arnowelzel.de> - 2019-09-17 10:45 +0200
Re: Object equals other object Arno Welzel <usenet@arnowelzel.de> - 2019-09-16 11:49 +0200
Re: Object equals other object Julio Di Egidio <julio@diegidio.name> - 2019-09-16 02:54 -0700
Re: Object equals other object Arno Welzel <usenet@arnowelzel.de> - 2019-09-16 11:56 +0200
Re: Object equals other object Julio Di Egidio <julio@diegidio.name> - 2019-09-16 03:09 -0700
Re: Object equals other object Arno Welzel <usenet@arnowelzel.de> - 2019-09-16 13:47 +0200
Re: Object equals other object Jon Ribbens <jon+usenet@unequivocal.eu> - 2019-09-16 13:43 +0000
Re: Object equals other object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-09-17 00:53 +0200
Re: Object equals other object Jon Ribbens <jon+usenet@unequivocal.eu> - 2019-09-16 23:03 +0000
Re: Object equals other object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-09-17 16:16 +0200
Re: Object equals other object Arno Welzel <usenet@arnowelzel.de> - 2019-09-17 16:57 +0200
Re: Object equals other object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-09-17 16:58 +0200
Re: Object equals other object Jon Ribbens <jon+usenet@unequivocal.eu> - 2019-09-17 16:31 +0000
Re: Object equals other object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-11-30 04:38 +0100
Re: Object equals other object John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-17 18:46 +0100
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