Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
> An object is an unordered set of name/value pairs.

To make it worse, I'm pretty sure that in JS this "object" should be written capitalized as "Object".

"Object" is the base "object" instance in JS from which all other objects inherit°, including the objects Array and Function. A literal "Object" is written with key value pairs surrounded by curlies. "object" is a type.

From a Perl perspective objects are best understood as tied hashes which lookup missing keys via the "prototype" chain (exposed in FF thru __proto__ ).

I'm starting to agree that Crockford should have avoided the term "object" in his JSON definition...


Demo from the FF console (please note that __proto__ is not necessarily available in other dialects)

> hash = {a:1} Object { a: 1 } > typeof hash "object" > array = [0,1,2] Array(3) [ 0, 1, 2 ] > typeof array "object" > array.__proto__ Array [] > array.__proto__.__proto__ Object { … }


> h={} // empty hash? Object { } > h["constructor"] // well, beware of inherited attributes function Object()


°) seems like newer ECMA versions allow the creation of objects without prototype. This would actually be very close to a Perl hash.

> h = Object.create(null) Object { } > h["constructor"] undefined

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery FootballPerl is like chess, only without the dice

In reply to Re^3: Outputting JSON with sorted names/keys (JS Object vs Perl hash / updated) by LanX
in thread Outputting JSON with sorted names/keys by pryrt

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others taking refuge in the Monastery: (5)
    As of 2020-07-13 08:46 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found