assigning a item from a .json file to a variable in javascript

Question

I have a data1.json file

[ { "BID" : "4569749", }, { "BID" : "466759", }, { "BID" : "4561149", }, ]

I want to call this .json file inside another abdv.js file and assign the BIDs to a variable array

var R1;

i.e the value of R1 = ['4569749', '466759', '4561149'] How can i do this??

.html file(please note: I am specifying only those parts relevant to this quetsion and erased other parts)

Code follows:

<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="abdv.js"></script>
<script>

    loadABCD();

   </script>

abvd.js

Code follows:

function loadABCD()
    {


  var R1 = [];
$.get('data1.json', function (data) {
    var parsedArr = JSON.parse(data),
    i = 0, l = parsedArr.length;
    for (i; i < l; i++) {
        R1.push(parsedArr[i].BID);
    }
});




for(k=0;k<R1.length;k++)
 {
    document.write(R1);
}   
        // i will use R1 for later processing another function

    //  for(k=0; k<R1.length; k++)
    //  {
    //  obj = loadLevel4Obj(R1[k]);
    //  scene.add(obj);
    //    } 




    }

I also need help to read .json file into a javascript JSON object. I doubt whether the format of my json file is correct. Do i need to specify any other jquery related libs in the html file?? How do i check whether the BIDs are correctly stored in the variable R1.

Answer 1

Assuming you've read your json file into a javascript JSON object (do you need help with that as well?)

var R1 = new Array();    

for(var i= 0 ; i< myJSON.length; i++){
   R1.push(myJSON[i].BID);
}

[EDIT]

Your document.write is happening before you've done any reading.

Remove it.

put a console.log instead in your anonymous callback from your $.get();

Make it look like this:

$.get('data1.json', function (data) {
    var parsedArr = JSON.parse(data),

    for (i = 0; i < parsedArr.length; i++) {
        R1.push(parsedArr[i].BID);
    }


    for(i=0; i< R1.length; i++)
      console.log("item " + i + " = " + R1[i]);
});

Also if your json file really looks like this:

[ { "BID" : "4569749", }, { "BID" : "466759", }, { "BID" : "4561149", }, ]

Then it needs to be fixed to remove the extraneous commas inside your objects. It should look like this:

[ { "BID" : "4569749" }, { "BID" : "466759" }, { "BID" : "4561149" } ]

I haven't tested this, but it looks like it should work to me.