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03.13.2008 at 05:33AM PDT, ID: 23238189
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9.0

str.match where needle contains "++" returns invalid quantifier

Asked by HaydnH in JavaScript

Tags: ,

Hi All,

I'm trying to do a needle/haystack search using str.match, however the needle variable contains a double plus (++). For some reason this is giving an error (Firefox 2.0.0.12 Error console) and not returning a proper value. The error is "invalid quantifier + due" (due is part of the needle I'm searching for).

I've included an example html page page which shows the problem, what's the nicest way of dealing with this? I can uriEncodeComponent both the needle & haystack but would prefer not to, is there anyway of getting javascript to recognise the fact that the ++ is part of the string and not code??

 Thanks,

Haydn.Start Free Trial 
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<html>
<head>
<SCRIPT language=JavaScript>
function test() {
  needle = "libstdc++";
  haystack = 'we\'re having problems with libstdc++ due to the pluses!'
 
  if (haystack.match('with ' + needle + ' due')) {
    alert('needled found!');
  } else {
    alert('needle not found');
  }
}
</SCRIPT>
</head>
<body>
<a href="" onClick='test(); return false;'>test</a>
</body>
</html>
[+][-]03.13.2008 at 05:34AM PDT, ID: 21115465

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[+][-]03.13.2008 at 05:51AM PDT, ID: 21115628

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[+][-]03.13.2008 at 05:54AM PDT, ID: 21115654

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[+][-]03.13.2008 at 05:55AM PDT, ID: 21115663

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[+][-]03.13.2008 at 06:09AM PDT, ID: 21115768

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[+][-]03.13.2008 at 06:52AM PDT, ID: 21116158

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About this solution

Zone: JavaScript
Tags: Java Script, Firefox/All
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Solution Provided By: Thejaka
Participating Experts: 3
Solution Grade: A
 
 
[+][-]03.13.2008 at 06:59AM PDT, ID: 21116248

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