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Message-ID: <3656450.xVHqiT2VU1@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Sat, 19 Nov 2011 18:17:24 +0100
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Subject: Re: Function arguments vs. local variables
Newsgroups: comp.lang.javascript
References: <j9olie$dsd$1@dont-email.me> <4775241.ypaU67uLZW@PointedEars.de> <j9p403$e80$1@dont-email.me> <2394720.ArG6xLiZAS@PointedEars.de> <j9p7t8$98q$1@dont-email.me> <j9pas5$ah2$1@speranza.aioe.org> <j9pb43$ah2$2@speranza.aioe.org> <j9pf87$rka$1@dont-email.me> <j9phhk$s3i$1@speranza.aioe.org> <4ec07ef1$0$28711$a8266bb1@newsreader.readnews.com> <j9q83e$b9m$1@speranza.aioe.org> <4ec11fb1$0$28605$a8266bb1@newsreader.readnews.com> <j9repq$vth$1@speranza.aioe.org> <4ec15e82$0$28617$a8266bb1@newsreader.readnews.com> <c303c6d2-b4c9-4057-8040-d908367c81f3@p2g2000vbj.googlegroups.com> <p6OdndndsIabIlzTnZ2dnUVZ8rKdnZ2d@giganews.com> <af7d752e-e9ef-491e-9729-365186b7a148@r9g2000vbw.googlegroups.com> <9iles3FnvhU1@mid.individual.net> <1550675.qVoOGUtdWV@PointedEars.de> <9imn3lF61bU1@mid.individual.net> <1543943.qVoOGUtdWV@PointedEars.de>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.javascript:8425

Thomas 'PointedEars' Lahn wrote:

>> Frobernik wrote:
>>> function findPos(obj, name, colour, b, c) {
>>>       name = obj.name;
>>>       colour = obj.colour;
>>>       b = 17;
>>>       c = [{s:'monkey', x:'male', a:3}, {s:'elephant',x:'female',a:7}];
>>> }
>>> findPos({name:'df', colour:'green'})
> 
> […]
> In an implementation of similar heuristics, Eclipse JSDT allows function
> arguments and variables to be displayed differently.  For example, I have
> set it up so that it would display argument declarations and references in
> bluish italic characters; the identifier in variable declarations in
> regular style, but underlined; and local variable references in
> normal-colored italic characters.  If I were to use your approach, I could
> not tell at a glance if an identifier was an argument or a local variable
                                           ^ used as
> name.  I could be ending up assigning to arguments, inadvertently altering
> the program flow after that assignment.  […]