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Groups > comp.lang.javascript > #38394
| From | Ben Bacarisse <ben.usenet@bsb.me.uk> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: check for obj nested prop |
| Date | 2020-05-09 03:09 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <873689yi4j.fsf@bsb.me.uk> (permalink) |
| References | <C9udnTlJHfCQbSnDnZ2dnUU7-U3NnZ2d@westnet.com.au> <87pnbeycrm.fsf@bsb.me.uk> <11518358.O9o76ZdvQC@PointedEars.de> |
Thomas 'PointedEars' Lahn <PointedEars@web.de> writes:
> Ben Bacarisse wrote:
>
>> Andrew Poulos <ap_prog@hotmail.com> writes:
>>> so I end up doing
>>>
>>> if (a && a.b && a.b.c && a.b.c.d)
>> <cut>
>>> Is there a way to get the check value of an object's nested property
>>> without first having to test for all the ascendant properties?
>>
>> if (try {obj.a.b.c.d} catch {})
>>
>> might do what you want.
>
> This is *obviously* syntactically invalid;
Yes, wishful thinking. You'd need a function call and a return:
if ( (()=>{ try {return obj.a.b.c.d} catch {} })() ) ...
which makes it rather clumsy.
--
Ben.
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check for obj nested prop Andrew Poulos <ap_prog@hotmail.com> - 2020-05-08 15:37 +1000
Re: check for obj nested prop Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-05-08 10:52 +0100
Re: check for obj nested prop Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-09 00:26 +0200
Re: check for obj nested prop Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-05-09 03:09 +0100
Re: check for obj nested prop Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-12 09:28 +0200
Re: check for obj nested prop Julio Di Egidio <julio@diegidio.name> - 2020-05-12 04:01 -0700
Exception handling (was: check for obj nested prop) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-09 03:46 +0200
Re: check for obj nested prop JJ <jj4public@vfemail.net> - 2020-05-08 17:18 +0700
Re: check for obj nested prop Julio Di Egidio <julio@diegidio.name> - 2020-05-08 03:53 -0700
Re: check for obj nested prop James Kirk <noneya.invalid@gmail.com> - 2020-05-08 11:00 -0400
Re: check for obj nested prop Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-09 00:19 +0200
Re: check for obj nested prop Julio Di Egidio <julio@diegidio.name> - 2020-05-12 04:04 -0700
Re: check for obj nested prop luserdroog <luser.droog@gmail.com> - 2020-05-12 07:59 -0700
Re: check for obj nested prop "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-12 14:17 -0700
Re: check for obj nested prop Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2020-05-13 02:46 +0200
Re: check for obj nested prop Andrew Poulos <ap_prog@hotmail.com> - 2020-05-13 13:08 +1000
Re: check for obj nested prop "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-05-13 12:30 -0700
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