how do i find a string between 2 delimiters please

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  • Phil
    #1

    how do i find a string between 2 delimiters please

    hello

    I am a trying to find the text between a ? mark and an = sign:
    var theData;
    var begin;
    var thePageNo;
    var beginFrom;
    beginFrom = top.location.hr ef.indexOf("=") ;
    begin = top.location.hr ef.indexOf("?") ;
    if (begin > 0 )
    {
    theData = top.location.hr ef.substring(be gin+1,location. href.length);
    theData = unescape(theDat a);
    ..........
    --
    what I need to do is pass the filename without the + sign and whatever
    follows it.

    So if the string passed is:
    Welcome To The 28 04 04 New Organiser v4.10
    http://philippeoget.50megs.com/?IT_Study___Information.htm=13


    I want to be able retrieve only the string up and including the = sign.
    ie.: http://philippeoget.50megs.com/?IT_S...nformation.htm

    I tried:
    theData = top.location.hr ef.substring(be gin+1,location. href.length-beginFrom);

    but it doesn't like it..

    TIA
    Regards

    Phil
    Tags: None
    • kaeli
      #2
      Re: how do i find a string between 2 delimiters please

      In article <f6350b11.04051 20653.62d0804e@ posting.google. com>,
      philippeoget@ya hoo.com enlightened us with...[color=blue]
      > hello
      >
      > I am a trying to find the text between a ? mark and an = sign:
      > var theData;
      > var begin;
      > var thePageNo;
      > var beginFrom;
      > beginFrom = top.location.hr ef.indexOf("=") ;
      > begin = top.location.hr ef.indexOf("?") ;
      > if (begin > 0 )
      > {
      > theData = top.location.hr ef.substring(be gin+1,location. href.length);
      > theData = unescape(theDat a);
      > .........
      >[/color]

      This worked for me. It's extensible so the URL can have more params. It
      assumes the one you want is the first part of the first pair ([0]).

      <html>
      <head>
      <title> New Document </title>
      </head>

      <body>
      <script language="javas cript" type="text/javascript">
      // split the query string into param=val pieces
      var qs = location.search .substr(locatio n.search.indexO f("?")+1);
      var pieces = qs.split("&"); // pieces has all the name/value pairs

      var piece = null;
      if (typeof pieces[0] != "undefined" ) piece = pieces[0].split("="); //
      piece has individual name/values for pieces[0]

      if (typeof piece[0] != "undefined" ) url = self.location.h ref+piece[0];
      alert(url);
      </script>
      </body>
      </html>

      --
      --
      ~kaeli~
      Shotgun wedding: A case of wife or death.
      http://www.ipwebdesign.net/wildAtHeart

      http://www.ipwebdesign.net/kaelisSpace


        Comment

        • Philippe Oget
          #3
          Re: how do i find a string between 2 delimiters please



          Regards

          Philippe
          Yahoo
          http://uk.geocities.com/philippeoget/


          *** Sent via Developersdex http://www.developersdex.com ***
          Don't just participate in USENET...get rewarded for it!

            Comment

            • Shawn Milo
              #4
              Re: how do i find a string between 2 delimiters please

              <snip>[color=blue]
              > So if the string passed is:
              > http://philippeoget.50megs.com/?IT_S...rmation.htm=13
              >
              > I want to be able retrieve only the string up and including the = sign.
              > ie.: http://philippeoget.50megs.com/?IT_S...nformation.htm
              >
              > I tried:
              > theData = top.location.hr ef.substring(be gin+1,location. href.length-beginFrom);
              >
              > but it doesn't like it..
              >
              > TIA
              > Regards
              >
              > Phil[/color]

              The easiest way to do this is with a regular expression.

              I just wrote and tested this:

              var someString =
              'http://philippeoget.50 megs.com/?IT_Study___Inf ormation.htm=13 ';

              document.write( someString + '<br/>');
              someString = someString.repl ace(/^.*\?(.*)=.*$/, '$1');
              document.write( someString + '<br/>');



              Shawn

                Comment

                • Shawn Milo
                  #5
                  Re: how do i find a string between 2 delimiters please

                  Phil,

                  Although my last post provided a working solution,
                  I realized that there is a flaw in my logic. I was
                  assuming that only one name/value pair will ever
                  be passed in the querystring. Please see below
                  for a correction.

                  For regex (regular expression) info, this
                  book is the best source:
                  http://www.oreilly.com/catalog/regex2/




                  Shawn




                  var someString =
                  'http://philippeoget.50 megs.com/?IT_Study___Inf ormation.htm=13 ';

                  //altered to further illustrate regex
                  someString =
                  'http://philippeoget.50 megs.com/?IT_Study___Inf ormation.htm=13 &lang=en';


                  //show original string
                  document.write( someString + '<br/>');

                  //perform replace
                  someString = someString.repl ace(/^.*\?(.*)=.*$/, '$1');

                  //show altered string
                  document.write( someString + '<br/>');


                  //
                  someString = '';
                  //someString = 'http://www.abc.com?pag e=it_study&lang =en';



                  //Note, this regex will work when there are more parameteres
                  //in the querystring than just one. The other one will not.
                  //Example:
                  Welcome To The 28 04 04 New Organiser v4.10
                  http://philippeoget.50megs.com/?IT_Study___Information.htm=13&lang=en

                  //The previous regex will return:
                  IT_Study___Info rmation.htm=13& lang
                  //This one will return: IT_Study___Info rmation.htm

                  someString = someString.repl ace(/^.*\?([^=]*)=.*$/, '$1');
                  document.write( someString + '<br/>');

                    Comment

                    • Philippe Oget
                      #6
                      Re: how do i find a string between 2 delimiters please

                      Thank you very much for your help.

                      Regards

                      Philippe
                      Yahoo
                      http://uk.geocities.com/philippeoget/


                      *** Sent via Developersdex http://www.developersdex.com ***
                      Don't just participate in USENET...get rewarded for it!

                        Comment

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