Re: How do I access nested key/value pairs?

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: How do I access nested key/value pairs?
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Date	Thu, 05 Mar 2015 16:25:27 +0100
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Denis McMahon wrote:

> On Wed, 04 Mar 2015 07:51:44 -0800, Masoom Tulsiani wrote:
>> var hash =
> 
> hash seems to be an object containing three anonymous objects with no
> means of distinguishing them.
> 
> Trying to load this in javascript causes an error because each element of
> an object (including a nested object) requires an identifier.

Utter nonsense.

- There is no “javascript”, see my sig.
- Objects do not have names (so it makes no sense to speak of “anonymous 
  objects”); they have identity (one object is different from another).
- Objects do not have elements; they have properties.  *Arrays* have
  elements; they are objects which also have indexes (special property
  names).
- Property names do not need to be identifiers (for example, indexes are
  not identifiers as they are representation of integers).  In
  implementations of ECMAScript Edition 5 and later they can even be
  reserved words.

  var x = {"1701foo": "bar"};
  var u = x;

  /* "bar" */
  u["1701foo"]

  x["1701foo"] = "baz";

  /* "baz" */
  u["1701foo"]

  /* true */
  u == x

  /* true */
  u === x

  /* ES 5+ only */
  x.float = Math.PI;

  /* 3.141592653589793… */
  u.float

-- 
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.

Thread

How do I access nested key/value pairs? Masoom Tulsiani <masoom.tulsiani@gmail.com> - 2015-03-04 07:51 -0800
  Re: How do I access nested key/value pairs? John Harris <niam@jghnorth.org.uk.invalid> - 2015-03-04 16:14 +0000
  Re: How do I access nested key/value pairs? Denis McMahon <denismfmcmahon@gmail.com> - 2015-03-04 18:08 +0000
    Re: How do I access nested key/value pairs? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-03-05 16:25 +0100
      Re: How do I access nested key/value pairs? John Harris <niam@jghnorth.org.uk.invalid> - 2015-03-06 10:26 +0000
        Re: How do I access nested key/value pairs? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-03-06 12:20 +0100
          Re: How do I access nested key/value pairs? John Harris <niam@jghnorth.org.uk.invalid> - 2015-03-06 20:18 +0000
  Re: How do I access nested key/value pairs? Scott Sauyet <scott.sauyet@gmail.com> - 2015-03-04 12:15 -0800
    Re: How do I access nested key/value pairs? Scott Sauyet <scott.sauyet@gmail.com> - 2015-03-04 12:17 -0800

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