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Re: Hello all I am new to json so I have a few questions

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  • marcrbraincast
    woops... ... var str = { output :[{ name : Michelle }]} ; would make a string...
    Message 1 of 15 , Jun 27, 2007
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      woops...
      >
      var str = "{'output':[{'name':'Michelle'}]}";
      would make a string...
    • timgerr
      ... better. ... string ... I am new to some of this so I might not be clear, I am woking with ajax and I am getting a string returned from another webpage that
      Message 2 of 15 , Jun 27, 2007
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        --- In json@yahoogroups.com, "marcrbraincast" <marcrbraincast@...>
        wrote:
        >
        > --- In json@yahoogroups.com, "timgerr" <tim.gallagher@> wrote:
        > >
        > <cut>
        > > >
        > > > The page reads:
        > > >
        > > > Dependencies
        > > > JSONError.js
        > > >
        > > > I guess you need that file included too...
        > > >
        > >
        > >
        > > Thank you for the information, I guess that I need to read
        better.
        > > Here is the biggest question that I have, lets say I have a
        string
        > >
        > > var test = {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob
        > > Jones"},{"name":"tester"},{"name":"Administrator"}]};
        > >
        > > Can I decode this back into an object?
        > >
        > > Thanks again for the help,
        > > -T
        > >
        >
        > the var test is already an object.
        > It's an object with one array which holds 4 objects.
        >
        > var str = "{'output':['name':'Michelle']}";
        > would make a string...
        >


        I am new to some of this so I might not be clear, I am woking with
        ajax and I am getting a string returned from another webpage that is
        JSON encoded. When I recieve it it is then consittered a string. I
        would like to take this returned string
        {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob Jones"},
        {"name":"tester"},{"name":"Administrator"}]}
        and put it back into a javascript object. Can I do that with decode?

        Thanks for the help,
        -T
      • Dan Joseph
        I am new to some of this so I might not be clear, I am woking with ... I think you might be looking for eval(). Here is what I do with my json requests: {
        Message 3 of 15 , Jun 27, 2007
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          I am new to some of this so I might not be clear, I am woking with

          > ajax and I am getting a string returned from another webpage that is
          > JSON encoded. When I recieve it it is then consittered a string. I
          > would like to take this returned string
          > {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob Jones"},
          > {"name":"tester"},{"name":"Administrator"}]}
          > and put it back into a javascript object. Can I do that with decode?
          >
          > _._,___
          >


          ---------------------

          I think you might be looking for eval(). Here is what I do with my json
          requests:

          { "errors" :
          [
          { "code" : "OK" }
          ];
          "cells" :
          [';
          { "cell" : "none" }
          ] }

          var j = eval('('+ xmlhttp.responseText +')');

          And then they are accessible in the form of: j.errors[0].code so if I do an
          alert( j.errors[0].code ); I'd get OK (the value of code). I'm pretty new
          to this also, so you may want to take my brief example and search around
          yahoo and google for a similar more in depth tutorial.

          --
          -Dan Joseph

          "Build a man a fire, and he will be warm for the rest of the day.
          Light a man on fire, and will be warm for the rest of his life."


          [Non-text portions of this message have been removed]
        • marcrbraincast
          ... I do an ... pretty new ... Hi Guys, That would mean that you are letting javascript evaluating possible unsafe json... thats why you should either use
          Message 4 of 15 , Jun 27, 2007
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            --- In json@yahoogroups.com, "Dan Joseph" <dmjoseph@...> wrote:
            >
            > I am new to some of this so I might not be clear, I am woking with
            >
            > > ajax and I am getting a string returned from another webpage that is
            > > JSON encoded. When I recieve it it is then consittered a string. I
            > > would like to take this returned string
            > > {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob Jones"},
            > > {"name":"tester"},{"name":"Administrator"}]}
            > > and put it back into a javascript object. Can I do that with decode?
            > >
            > > _._,___
            > >
            >
            >
            > ---------------------
            >
            > I think you might be looking for eval(). Here is what I do with my json
            > requests:
            >
            > { "errors" :
            > [
            > { "code" : "OK" }
            > ];
            > "cells" :
            > [';
            > { "cell" : "none" }
            > ] }
            >
            > var j = eval('('+ xmlhttp.responseText +')');
            >
            > And then they are accessible in the form of: j.errors[0].code so if
            I do an
            > alert( j.errors[0].code ); I'd get OK (the value of code). I'm
            pretty new
            > to this also, so you may want to take my brief example and search around
            > yahoo and google for a similar more in depth tutorial.
            >
            > --
            > -Dan Joseph
            >
            > "Build a man a fire, and he will be warm for the rest of the day.
            > Light a man on fire, and will be warm for the rest of his life."
            >
            >
            > [Non-text portions of this message have been removed]
            >

            Hi Guys,

            That would mean that you are letting javascript evaluating possible
            unsafe json... thats why you should either use json.js from Douglas
            (http://www.json.org/json.js) or the JSON.js from devpro.it...

            If the json object/string is safe because you are generating it or it
            comes from a safe source... then by all means use eval()...

            I am unfamiliar with the JSON.js library so I would say give it a go
            with the JSONError.js in there as well... if it still gives problems
            you might want to use http://www.jslint.com/lint.html to check the
            json... otherwise, why don't you ask the guy from devpro.it?

            And then there's always the possibility to just post as much code as
            you are willing to share with the json so we can test it and see what
            errors you are getting ;p
          • Mark Ireland
            For a smaller jsObject can there be a json variable like this: { totalItems :40, itemsFound :2, UNIQUEIDS :[ js63013 , js63009 ],
            Message 5 of 15 , Jun 27, 2007
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              For a smaller jsObject can there be a json variable like this:

              {"totalItems":40, "itemsFound":2, "UNIQUEIDS":["js63013","js63009"],
              "columnnames":["Company,Title,Name,Phone,Email"], items: ["js63013":
              {"A1 Services",
              "CEO",
              "Jane Jones",
              "800-555-2121",
              "janejones@..."},

              "js63009":{"Acme",
              "President",
              "John Smith",
              "800-555-1212",
              "johnsmith@..."}
              ]}


              rather than this:

              {SalesDatabase2:
              {totalItems:40, itemsFound:2, items: [
              {Company:"A1 Services",
              Title:"CEO",
              Name:"Jane Jones",
              Phone:"800-555-2121",
              Email:"janejones@..."},

              {Company:"Acme",
              Title:"President",
              Name:"John Smith",
              Phone:"800-555-1212",
              Email:"johnsmith@..."}
              ]}
              }

              _________________________________________________________________
              Advertisement: ninemsn Travel - Hot deals, travel ideas & Lonely Planet
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            • marcrbraincast
              ... UNIQUEIDS :[ js63013 , js63009 ], ...
              Message 6 of 15 , Jun 27, 2007
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                --- In json@yahoogroups.com, "Mark Ireland" <markincuba@...> wrote:
                >
                >
                > For a smaller jsObject can there be a json variable like this:
                >
                > {"totalItems":40, "itemsFound":2,
                "UNIQUEIDS":["js63013","js63009"],
                > "columnnames":["Company,Title,Name,Phone,Email"], items: ["js63013":
                > {"A1 Services",
                > "CEO",
                > "Jane Jones",
                > "800-555-2121",
                > "janejones@..."},
                >
                > "js63009":{"Acme",
                > "President",
                > "John Smith",
                > "800-555-1212",
                > "johnsmith@..."}
                > ]}
                >
                >
                > rather than this:
                >
                > {SalesDatabase2:
                > {totalItems:40, itemsFound:2, items: [
                > {Company:"A1 Services",
                > Title:"CEO",
                > Name:"Jane Jones",
                > Phone:"800-555-2121",
                > Email:"janejones@..."},
                >
                > {Company:"Acme",
                > Title:"President",
                > Name:"John Smith",
                > Phone:"800-555-1212",
                > Email:"johnsmith@..."}
                > ]}
                > }
                >
                > _________________________________________________________________
                > Advertisement: ninemsn Travel - Hot deals, travel ideas & Lonely Planet
                > guides.
                >
                http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=799&referral=hotmailtagline&URL=http://travel.ninemsn.com.au/compIntro.aspx?compId=2404
                >

                Then it would probably become something like this:

                {"totalItems":40,"itemsFound":2,"UNIQUEIDS":["js63013","js63009"],"columnnames":["Company","Title","Name","Phone","Email"],"items":{"js63013":["A1
                Services","CEO","Jane Jones","800-555-2121","janejones@a1service
                s.com"],"js63009":[" Acme","President","John
                Smith","800-555-1212","johnsmith@acme. com"]}}

                But although that probably results in a somewhat smaller json string I
                don't really see a benefit, in fact, the object looks a lot more
                difficult to get the value's form.
              • marcrbraincast
                ... Planet ...
                Message 7 of 15 , Jun 27, 2007
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                  --- In json@yahoogroups.com, "marcrbraincast" <marcrbraincast@...> wrote:
                  >
                  > --- In json@yahoogroups.com, "Mark Ireland" <markincuba@> wrote:
                  > >
                  > >
                  > > For a smaller jsObject can there be a json variable like this:
                  > >
                  > > {"totalItems":40, "itemsFound":2,
                  > "UNIQUEIDS":["js63013","js63009"],
                  > > "columnnames":["Company,Title,Name,Phone,Email"], items: ["js63013":
                  > > {"A1 Services",
                  > > "CEO",
                  > > "Jane Jones",
                  > > "800-555-2121",
                  > > "janejones@"},
                  > >
                  > > "js63009":{"Acme",
                  > > "President",
                  > > "John Smith",
                  > > "800-555-1212",
                  > > "johnsmith@"}
                  > > ]}
                  > >
                  > >
                  > > rather than this:
                  > >
                  > > {SalesDatabase2:
                  > > {totalItems:40, itemsFound:2, items: [
                  > > {Company:"A1 Services",
                  > > Title:"CEO",
                  > > Name:"Jane Jones",
                  > > Phone:"800-555-2121",
                  > > Email:"janejones@"},
                  > >
                  > > {Company:"Acme",
                  > > Title:"President",
                  > > Name:"John Smith",
                  > > Phone:"800-555-1212",
                  > > Email:"johnsmith@"}
                  > > ]}
                  > > }
                  > >
                  > > _________________________________________________________________
                  > > Advertisement: ninemsn Travel - Hot deals, travel ideas & Lonely
                  Planet
                  > > guides.
                  > >
                  >
                  http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=799&referral=hotmailtagline&URL=http://travel.ninemsn.com.au/compIntro.aspx?compId=2404
                  > >
                  >
                  > Then it would probably become something like this:
                  >
                  >
                  {"totalItems":40,"itemsFound":2,"UNIQUEIDS":["js63013","js63009"],"columnnames":["Company","Title","Name","Phone","Email"],"items":{"js63013":["A1
                  > Services","CEO","Jane Jones","800-555-2121","janejones@a1service
                  > s.com"],"js63009":[" Acme","President","John
                  > Smith","800-555-1212","johnsmith@acme. com"]}}
                  >
                  > But although that probably results in a somewhat smaller json string I
                  > don't really see a benefit, in fact, the object looks a lot more
                  > difficult to get the value's form.
                  >

                  grrr.... let's try that again... :/


                  {"totalItems":40,
                  "itemsFound":2,
                  "UNIQUEIDS":["js63013","js63009"],
                  "columnnames":["Company","Title","Name","Phone","Email"],
                  "items":{"js63013":
                  ["A1 Services","CEO","Jane Jones",
                  "800-555-2121","janejones@..."],
                  "js63009":
                  [" Acme","President","John Smith",
                  "800-555-1212","johnsmith@acme. com"]}}
                • Don Owens
                  Do you mean the other way around? I.e., using unquoted keys? The JSON spec says that the keys must be quoted. The reason for this is that there is a bug in
                  Message 8 of 15 , Jun 28, 2007
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                    Do you mean the other way around? I.e., using unquoted keys? The
                    JSON spec says that the keys must be quoted. The reason for this is
                    that there is a bug in Javascript where it will treat a key as a
                    keyword if it is unquoted and matches a keyword. Javascript is not
                    smart enough to realize it should not be treating the key as a keyword.


                    --- In json@yahoogroups.com, "Mark Ireland" <markincuba@...> wrote:
                    >
                    >
                    > For a smaller jsObject can there be a json variable like this:
                    >
                    > {"totalItems":40, "itemsFound":2,
                    "UNIQUEIDS":["js63013","js63009"],
                    > "columnnames":["Company,Title,Name,Phone,Email"], items: ["js63013":
                    > {"A1 Services",
                    > "CEO",
                    > "Jane Jones",
                    > "800-555-2121",
                    > "janejones@..."},
                    >
                    > "js63009":{"Acme",
                    > "President",
                    > "John Smith",
                    > "800-555-1212",
                    > "johnsmith@..."}
                    > ]}
                    >
                    >
                    > rather than this:
                    >
                    > {SalesDatabase2:
                    > {totalItems:40, itemsFound:2, items: [
                    > {Company:"A1 Services",
                    > Title:"CEO",
                    > Name:"Jane Jones",
                    > Phone:"800-555-2121",
                    > Email:"janejones@..."},
                    >
                    > {Company:"Acme",
                    > Title:"President",
                    > Name:"John Smith",
                    > Phone:"800-555-1212",
                    > Email:"johnsmith@..."}
                    > ]}
                    > }
                    >
                    > _________________________________________________________________
                    > Advertisement: ninemsn Travel - Hot deals, travel ideas & Lonely Planet
                    > guides.
                    >
                    http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=799&referral=hotmailtagline&URL=http://travel.ninemsn.com.au/compIntro.aspx?compId=2404
                    >
                  • Don Owens
                    Yes, via the parseJSON method called on a string (see http://www.json.org/json.js). Don t use eval() unless the JSON is from a trusted source, i.e., you know
                    Message 9 of 15 , Jun 28, 2007
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                      Yes, via the parseJSON method called on a string (see
                      http://www.json.org/json.js). Don't use eval() unless the JSON is
                      from a trusted source, i.e., you know there are no function calls in
                      there.


                      --- In json@yahoogroups.com, "timgerr" <tim.gallagher@...> wrote:
                      >
                      > --- In json@yahoogroups.com, "marcrbraincast" <marcrbraincast@>
                      > wrote:
                      > >
                      > > --- In json@yahoogroups.com, "timgerr" <tim.gallagher@> wrote:
                      > > >
                      > > <cut>
                      > > > >
                      > > > > The page reads:
                      > > > >
                      > > > > Dependencies
                      > > > > JSONError.js
                      > > > >
                      > > > > I guess you need that file included too...
                      > > > >
                      > > >
                      > > >
                      > > > Thank you for the information, I guess that I need to read
                      > better.
                      > > > Here is the biggest question that I have, lets say I have a
                      > string
                      > > >
                      > > > var test = {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob
                      > > > Jones"},{"name":"tester"},{"name":"Administrator"}]};
                      > > >
                      > > > Can I decode this back into an object?
                      > > >
                      > > > Thanks again for the help,
                      > > > -T
                      > > >
                      > >
                      > > the var test is already an object.
                      > > It's an object with one array which holds 4 objects.
                      > >
                      > > var str = "{'output':['name':'Michelle']}";
                      > > would make a string...
                      > >
                      >
                      >
                      > I am new to some of this so I might not be clear, I am woking with
                      > ajax and I am getting a string returned from another webpage that is
                      > JSON encoded. When I recieve it it is then consittered a string. I
                      > would like to take this returned string
                      > {"outPut":[{"name":"Michelle Gallagher"},{"name":"Bob Jones"},
                      > {"name":"tester"},{"name":"Administrator"}]}
                      > and put it back into a javascript object. Can I do that with decode?
                      >
                      > Thanks for the help,
                      > -T
                      >
                    • Mark Ireland
                      Somewhat smaller? I was thinking a large object would be shrunk by half because there would be no repetition of the columnnames everywhere. . ... And I thought
                      Message 10 of 15 , Jun 28, 2007
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                        Somewhat smaller? I was thinking a large object would be shrunk by half
                        because there would be no repetition of the columnnames everywhere. . ...

                        And I thought my idea would make getting a value as easy as

                        myJSON["js63009"].Company

                        I suppose the list of columnnames could be an array since people would
                        propbably make it into one so they can loop over it?

                        >Then it would probably become something like this:
                        >
                        >{"totalItems":40,"itemsFound":2,"UNIQUEIDS":["js63013","js63009"],"columnnames":["Company","Title","Name","Phone","Email"],"items":{"js63013":["A1
                        >Services","CEO","Jane Jones","800-555-2121","janejones@a1service
                        >s.com"],"js63009":[" Acme","President","John
                        >Smith","800-555-1212","johnsmith@acme. com"]}}
                        >
                        >But although that probably results in a somewhat smaller json string I
                        >don't really see a benefit, in fact, the object looks a lot more
                        >difficult to get the value's form.
                        >
                        >

                        _________________________________________________________________
                        Advertisement: ninemsn Travel - Hot deals, travel ideas & Lonely Planet
                        guides.
                        http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=799&referral=hotmailtagline&URL=http://travel.ninemsn.com.au/compIntro.aspx?compId=2404
                      • marcrbraincast
                        Okay, fair enough... it will get smaller... You could indeed loose the list of columns and even the UNIQUEIDS and the totalItems... Not sure what the
                        Message 11 of 15 , Jun 29, 2007
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                          Okay, fair enough... it will get smaller...
                          You could indeed loose the list of columns and even the UNIQUEIDS and
                          the totalItems...

                          Not sure what the itemsFound does...


                          var j = {"itemsFound":2,
                          "items":[
                          {"js63013":["A1 Services","CEO","Jane
                          Jones","800-555-2121","janejones@..."]},
                          {"js63009":[" Acme","President","John
                          Smith","800-555-1212","johnsmith@acme. com"]}
                          ]
                          };
                          window.onload = function(){
                          var txt = "";
                          var col = j.items;
                          var totalitems = j.items.length;
                          for (var i=0;i<totalitems;i++){
                          for (j in col[i]){
                          txt += col[i][j] + " \n";
                          }

                          }
                          alert(totalitems + "\n" + txt);
                          }







                          --- In json@yahoogroups.com, "Mark Ireland" <markincuba@...> wrote:
                          >
                          >
                          > Somewhat smaller? I was thinking a large object would be shrunk by half
                          > because there would be no repetition of the columnnames everywhere.
                          . ...
                          >
                          > And I thought my idea would make getting a value as easy as
                          >
                          > myJSON["js63009"].Company
                          >
                          > I suppose the list of columnnames could be an array since people would
                          > propbably make it into one so they can loop over it?
                          >
                          > >Then it would probably become something like this:
                          > >
                          >
                          >{"totalItems":40,"itemsFound":2,"UNIQUEIDS":["js63013","js63009"],"columnnames":["Company","Title","Name","Phone","Email"],"items":{"js63013":["A1
                          > >Services","CEO","Jane Jones","800-555-2121","janejones@a1service
                          > >s.com"],"js63009":[" Acme","President","John
                          > >Smith","800-555-1212","johnsmith@acme. com"]}}
                          > >
                          > >But although that probably results in a somewhat smaller json string I
                          > >don't really see a benefit, in fact, the object looks a lot more
                          > >difficult to get the value's form.
                          > >
                          > >
                          >
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