javascript - Getting unique value from the json data -

how unique merchant name , corresponding avgprice , numproducts using jquery? i`ve been having hard time seperating json data. please me guys.. parsing json file using $.getjson. creating graph need use seperator after every merchant names. here avgprice , numproducts x , y axes values. if use this

$.getjson("mock/insight72.json", function(returneddata) {         datalength = returneddata.data.length; console.log(returneddata) response = returneddata;         var x = new array();         var y = new array();         var mytext, f;          ( = 0; < datalength; i++) {              x[i] = returneddata.data[i].avgprice;             y[i] = returneddata.data[i].numproducts; 

x , y axis getting stored in same order. need parse should take avgprice , numproducts corresponding merchant name. hope clarifies..

 {     "id" : "72",     "title" : "item category product level average price comparison",     "xlabel" : null,     "ylabel" : "average price",     "zlabel" : null,      "data" : [         {             "avgprice" : 10,             "categoryid" : "152b7934dd7e4fbeac56f825b5deaebd",             "categoryname" : "coffee makers",             "merchantid" : "99a8cd5687d245f8bff2152fec710973",             "merchantname" : "crate & barrel",             "numproducts" : 400         },         {             "avgprice" : 20,             "categoryid" : "152b7934dd7e4fbeac56f825b5deaebd",             "categoryname" : "coffee makers",             "merchantid" : "f5b2c736eace488a859fb6c56f366522",             "merchantname" : "williams-sonoma",             "numproducts" : 500          },         {             "avgprice" :30,             "categoryid" : "152b7934dd7e4fbeac56f825b5deaebd",             "categoryname" : "coffee makers",             "merchantid" : "6ee163f4f236466289fae97bb40351b7",             "merchantname" : "amazon",             "numproducts" : 38         },         {             "avgprice" : 40,             "categoryid" : "50215adc9ef64f91b4f4898fda7cf0b5",             "categoryname" : "dishwashers",             "merchantid" : "99a8cd5687d245f8bff2152fec710973",             "merchantname" : "crate & barrel",             "numproducts" : 300          },         {             "avgprice" : 50,             "categoryid" : "50215adc9ef64f91b4f4898fda7cf0b5",             "categoryname" : "dishwashers",             "merchantid" : "f5b2c736eace488a859fb6c56f366522",             "merchantname" : "williams-sonoma",             "numproducts" : 320         },         {             "avgprice" : 60,             "categoryid" : "50215adc9ef64f91b4f4898fda7cf0b5",             "categoryname" : "dishwashers",             "merchantid" : "6ee163f4f236466289fae97bb40351b7",             "merchantname" : "amazon",             "numproducts" : 350         }     ] } 

here's working fiddle: http://jsfiddle.net/esv6f/

/* items merchant*/ function get_items_by_merchant(merchant_name) {     var items = new array();     $.each(json.data, function(index, item) {         if (item.merchantname == merchant_name)              items.push(item);     });      return items; }  /* items of merchant "amazon" */ var amazon_items = get_items_by_merchant("amazon");  /* count total num of products */  var amazon_num_products_total = 0;  /* loop items */ $.each(amazon_items, function(index, item) {     amazon_num_products_total += item.numproducts; // add numproducts       /* alert avgprice , numproducts of current item */     alert("avgprice: " + item.avgprice + " numproducts: " + item.numproducts); });  /* alert total num of products of amazon */  alert("amazon numproducts total: " + amazon_num_products_total);