Hello everyone,
I am using a regular expression to parse a text string into various parts -- for ex: string "How do you do" will be changed to array with all the words and white spaces.
I am using the following code (which has been copied from internet) -
<html>
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<body>
-
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<script type="text/javascript">
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var text = "Hello how@are you.com";
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var result = tokenize(text,true,true);
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document.write(result.join(','));
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function tokenize(text,capture,noflatten)
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{
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_normalizer_regex_str='(?:(?:^| +)["\'.\\-]+ *)|(?: *[\'".\\-]+(?: +|$)|@| +)';
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_normalizer_regex=new RegExp(_normalizer_regex_str,'g');
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_normalizer_regex_capture=new RegExp('('+_normalizer_regex_str+')','g');
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return(noflatten?text:flatten_string(text)).split(capture?_normalizer_regex_capture:_normalizer_regex);
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}
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function flatten_string(text)
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{
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var accents={a:/à |á|â|ã|ä|Ã¥/g,c:/ç/g,d:/ð/g,e:/è|é|ê|ë/g,i:/ì|Ã*|î|ï/g,n:/ñ/g,o:/ø|ö|õ|ô|ó|ò/g,u:/ü|û|ú|ù/g,y:/ÿ|ý/g,ae:/æ/g,oe:/Å“/g}
-
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text=text.toLowerCase();
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for(var i in accents)
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{
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text=text.replace(accents[i],i);
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}
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return text;
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}
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</script>
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</body>
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</html>
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This code is working fine in Mozilla Firefox 2.0 but not working fine in IE 7.0.
If you execute this code, you will see that the result in both browsers are different.
While firefox also returns the splitting delimiters as a part of the array, IE 7.0 seems to ignore the delimiters and simply pass back the array without the delimiters.
I am new to regular expresssions and not able to find out how this regular expression works (since it has been copied from internet).
If someone can help me fix the above code to return same results in case of IE7 and Firefox, that would be great help.
Thanks,
Rupinder
3  8882  acoder 16,027
Recognized Expert Moderator MVP
Changed the thread title to better describe the problem.
Read about regular expressions in Javascript here.
Hello Everyone,
I was able to find the solution to the problem. The original coder on the internet has extended the String.split function to achieve proper functionality.
Sharing it below for others to use: -
String.prototype._split=String.prototype.split;
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String.prototype.split=function(separator,limit)
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{
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var flags="";
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if(separator===null||limit===null)
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{
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return[];
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}
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else if(typeof separator=='string')
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{
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return this._split(separator,limit);
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}
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else if(separator===undefined)
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{
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return[this.toString()];
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}
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else if(separator instanceof RegExp)
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{
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if(!separator._2||!separator._1)
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{
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flags=separator.toString().replace(/^[\S\s]+\//,"");
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if(!separator._1)
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{
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if(!separator.global)
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{
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separator._1=new RegExp(separator.source,"g"+flags);
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}
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else
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{
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separator._1=1;
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}
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}
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}
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separator1=separator._1==1?separator:separator._1;
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var separator2=(separator._2?separator._2:separator._2=new RegExp("^"+separator1.source+"$",flags));
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if(limit===undefined||limit<0)
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{
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limit=false;
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}
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else
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{
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limit=Math.floor(limit);
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if(!limit)return[];
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}
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var match,output=[],lastLastIndex=0,i=0;
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while((limit?i++<=limit:true)&&(match=separator1.exec(this)))
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{
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if((match[0].length===0)&&(separator1.lastIndex>match.index))
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{
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separator1.lastIndex--;
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}
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if(separator1.lastIndex>lastLastIndex)
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{
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if(match.length>1)
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{
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match[0].replace(separator2,function(){for(var j=1;j<arguments.length-2;j++){if(arguments[j]===undefined)match[j]=undefined;}});
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}
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output=output.concat(this.substring(lastLastIndex,match.index),(match.index===this.length?[]:match.slice(1)));
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lastLastIndex=separator1.lastIndex;
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}
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if(match[0].length===0)
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{
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separator1.lastIndex++;
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}
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}
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return(lastLastIndex===this.length)?(separator1.test("")?output:output.concat("")):(limit?output:output.concat(this.substring(lastLastIndex)));
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}
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else
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{
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return this._split(separator,limit);
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}
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}
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Thanks,
Rupinder
acoder 16,027
Recognized Expert Moderator MVP
Thanks for posting your solution. Glad to hear that you got it working. Post again any time if you have more questions.
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