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Message-ID: <1795049.zBDcGp28eQ@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Sat, 03 Nov 2012 12:26:52 +0100
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Subject: Re: Good use of bitwise NOT "~" or unnecessary obfuscation?
Newsgroups: comp.lang.javascript
References: <50330d14-3a30-4885-9833-18c75717a04d@googlegroups.com> <XnsA0FF6988CAC95eejj99@194.109.133.133> <BMSdnRSFG8QIVA7NnZ2dnUVZ_vGdnZ2d@earthlink.com> <1805042.BzeuYpbCYS@PointedEars.de>
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Thomas 'PointedEars' Lahn wrote:

> […] However, the following can be useful and necessary:
> 
>   if ((new RegExp(someOtherString, "i")).test(someString))
> 
> The caveat in both cases is that any special characters in the value of
> `someOtherString' that should not assume their special meaning need to be
> escaped.  This can be accomplished with a previous replace() –
> 
>   if ((new RegExp(someOtherString.replace(/…/g), "i")).test(someString))

Should be

  if ((new RegExp(someOtherString.replace(/[…]/g, "\\$&"), "i"))
      .test(someString))
 
where `…' specifies the (empty-string delimited) list of (special) 
characters to be escaped (escaped themselves if necessary).  The later 
mentioned user-defined methods are preferable to that, of course.

> […]


PointedEars
-- 
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