Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.teledata-fn.de!newsfeed.arcor.de!newsspool3.arcor-online.net!news.arcor.de.POSTED!not-for-mail
Content-Type: text/plain; charset="UTF-8"
Message-ID: <1594950.6B0bxvmOZc@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Wed, 06 Jun 2012 08:27:19 +0200
User-Agent: KNode/4.4.11
Content-Transfer-Encoding: 8Bit
X-Face: %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&.<b';Md8`dH6iqhT)6C^.Px|[=M@7=Ik[_w<%n1Up"LPQNu2m8|L!/3iby{-]A+#YE}Kl{Cw$\U!kD%K}\2jz"QQP6Uqr],./"?;=4v
Face: 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
Subject: Re: Difference between == and ===?
Newsgroups: comp.lang.javascript
References: <fdbf7a9e-449f-43e5-891f-5da5c74a27ca@googlegroups.com> <57c2fe99-d417-4208-8e95-bb29e80f6a11@googlegroups.com> <jq1u5q$vsm$1@dont-email.me> <2988697.zEMfXcGtAu@PointedEars.de> <b51dbdc2-aa4f-4e87-81fa-79f3899b97e5@googlegroups.com> <XnsA062BB970A51eejj99@194.109.133.133> <3ca008ea-5387-4044-80ca-033e441a4f46@googlegroups.com> <XnsA062F29C6BAE2eejj99@194.109.133.133> <jq48nb$f7m$1@dont-email.me> <XnsA06363C88BFBeejj99@194.109.133.133> <jq4khh$79k$1@dont-email.me> <RNB9jpGV4ixPFwsH@J.A830F0FF37FB96852AD08924D9443D28E23ED5CD> <jq5knk$a5h$1@dont-email.me> <1nBTslEYmMyPFwSi@J.A830F0FF37FB96852AD08924D9443D28E23ED5CD> <Wj9yr.13835$0x2.3107@newsfe13.iad> <JRUUbNIW9zyPFwG+@J.A830F0FF37FB96852AD08924D9443D28E23ED5CD> <PjNch1HDZQzPFw9$@invalid.uk.co.demon.merlyn.invalid> <jql7em$9d0$1@news.albasani.net> <XnsA069CD919A8F5eejj99@194.109.133.133>
Followup-To: comp.lang.javascript
MIME-Version: 1.0
Lines: 35
NNTP-Posting-Date: 06 Jun 2012 08:27:20 CEST
NNTP-Posting-Host: cdbb7df3.newsspool3.arcor-online.net
X-Trace: DXC=J;M_[RVnoQ5D]ncZ]`hZ;1McF=Q^Z^V384Fo<]lROoR18kF<OcfhCO;[iUmQ1SdEV=DZm8W4\YJN<J`:FmdeL>K0fQ>EOE\[m`;?]A:;lTgTU1
X-Complaints-To: usenet-abuse@arcor.de
Xref: csiph.com comp.lang.javascript:14349

Evertjan. wrote:

> BGB wrote on 05 jun 2012 in comp.lang.javascript:
>> FWIW, I had generally interpreted it more like:
>> "null" means "there is no object here";
> 
> "null" means a variable is not filled
> with an allowed type value.
> 
> Not very usefull in JS variables,

Utter nonsense, all of the above.

> but usefull for a numeric database field.

True.

>> "undefined" means "this value is not valid".
> 
> "undefined" is a valid value of a variable in JS,

`undefined' is the solve value of the primitive Undefined type.

> automagically assigned to a previously undefined variable,

Variables are initialized with undefined unless assigned otherwise.

> and can be assigned to a existing variable.

… or property.


PointedEars
-- 
When all you know is jQuery, every problem looks $(olvable).