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Message-ID: <67753241.vmHCXkPt3z@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Mon, 03 Dec 2012 23:20:59 +0100
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Subject: Re: IE9 is not a friend...
Newsgroups: comp.lang.javascript
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Xref: csiph.com comp.lang.javascript:17439

Cezary Tomczyk wrote:

> Personally I use something extra (except checking length) to be sure if
> field is really empty:
> 
> var isEmpty = (function(){
>     var notEmpty = new RegExp('[^\\t\\n\\r ]');

      var notEmpty = /\S/;

>     return function(str){
>        if(typeof str !=== 'string'){
>           return false;
>        }
>        return !notEmpty.test(str);
>     }

RegExp.prototype.test() converts its argument to String.  Therefore:

      return function (str) {
        return !notEmpty.test(str);
      };
 
> }());

… with which the function isEmpty() likely vanishes in a puff of logic.


PointedEars
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