Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.javascript > #30110

Re: Can somebody explain this code

Path csiph.com!news.mixmin.net!weretis.net!feeder1.news.weretis.net!news.solani.org!.POSTED!not-for-mail
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups comp.lang.javascript
Subject Re: Can somebody explain this code
Date Thu, 24 Mar 2016 20:30:29 +0100
Organization PointedEars Software (PES)
Lines 28
Message-ID <2380128.LjnWGdRavf@PointedEars.de> (permalink)
References <ncv2un$mlp$1@dont-email.me>
Reply-To Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Mime-Version 1.0
Content-Type text/plain; charset="UTF-8"
Content-Transfer-Encoding 8Bit
X-Trace solani.org 1458847830 20465 eJwNycEBwCAIA8CVCgYC4zRU9x/B3vdipeUQGYk4cVhKc2g3TPPmLohBG37urRLWvw+PIPn0BRU7EQA= (24 Mar 2016 19:30:30 GMT)
X-Complaints-To abuse@news.solani.org
NNTP-Posting-Date Thu, 24 Mar 2016 19:30:30 +0000 (UTC)
User-Agent KNode/4.14.2
X-User-ID eJwNyckRwDAIBLCWgAU27cQc/ZdgPzUKpGbRM9JjY896h1s0lMb+USPa8olC57iXDvjYNGhugTwvzSc3B3IBPA0UhA==
Cancel-Lock sha1:ZH9Sfegu8Arrvsu5t/+zq35ZfNw=
X-NNTP-Posting-Host eJwNysEBwCAIA8CVsAlRxgHR/Uew9z6HhvakXPTrl0TWIirZvmSz/VikNYZVCHn++g20ojbUDw5FEJU=
Xref csiph.com comp.lang.javascript:30110

Show key headers only | View raw


Tony Johansson wrote:

> I know that functions behave much like variables such as
> var myFunc = function() { alert("This is my anonymous function");}

A misconception.  Instead, the variable “myFunc” is being declared, and 
initialized with (i.e., being assigned as first value) a reference to an 
object, a Function instance.  That object’s “name” property has the value "" 
(as inherited from the Function prototype object); it is an anonymous 
function as it was created with what is commonly called an “anonymous 
function expression” (AFE).  [The right-hand side is equivalent to a 
“lambda” expression, e.g. in Python.]

It is *functionally* equivalent to

  var myFunc;
  myFunc = function () { alert("This is my anonymous function"); };

(In that case, “myFunc” is assigned the “undefined” value first.)
 
<http://www.ecma-international.org/ecma-262/6.0/#sec-variable-statement>
<http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances-name>

-- 
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.

Back to comp.lang.javascript | Previous | NextPrevious in thread | Next in thread | Find similar | Unroll thread


Thread

Can somebody explain this code "Tony Johansson" <johansson.andersson@telia.com> - 2016-03-23 22:51 +0100
  Re: Can somebody explain this code Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-03-24 20:30 +0100
    Re: Can somebody explain this code Aleksandro <aleksandro@gmx.com> - 2016-03-24 20:19 -0300
      Re: Can somebody explain this code Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-03-27 22:44 +0200
        Re: Can somebody explain this code Aleksandro <aleksandro@gmx.com> - 2016-03-27 18:22 -0300
          Re: Can somebody explain this code Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-03-28 01:07 +0200
            Re: Can somebody explain this code Aleksandro <aleksandro@gmx.com> - 2016-03-27 20:26 -0300
              Re: Can somebody explain this code Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-05-04 05:51 +0200
                Re: Can somebody explain this code "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-05-04 08:55 +0200
                Re: Can somebody explain this code Aleksandro <aleksandro@gmx.com> - 2016-05-07 13:02 -0300

csiph-web