javascript keys and objects

Question

I have a javascript code below:

function init() {
   var data_pie = [];
   var data_key = [];

   data_pie.push(10,12,30,40,80,25);        
   data_key.push("x1","x2","x3","x4","x5","x6");        
   g.update(data_pie, data_key);
}

update: function(data, key) {
   var i=-1;

   var streakerDataAdded = d3.range(data.length).map(function() {
     i++;
       return {
         name: key[i],
         totalPlayers: data[i]
       }
   });
}

How can I optimize my code to use this object:

var data='{"data":[{"x1":"10","x2":"12","x3":"30","x4":"40","x5":"80","x6":"25"}]}';

Instead data_pie and data_key arrays?

The variable you are trying to use is a JSON object. Have a look at this website and see what you can come up with: json.org/js.html — Kevin Anthony Oppegaard Rose
– Kevin Anthony Oppegaard Rose, Commented Jan 15, 2013 at 7:16

Gareth Cornish · Accepted Answer · 2013-01-15 07:21:52Z

1

Without being able to test this (not having any access to the rest of your code), you might try something like:

function init() {
   var data='{"data":[{"x1":"10","x2":"12","x3":"30","x4":"40","x5":"80","x6":"25"}]}';

   for(key in data.data[0]){        
       g.update(data.data[0][key], key, data.data[0].length);
   }
}

update: function(data, key, length) {    
   var streakerDataAdded = d3.range(length).map(function() {
       return {
         name: key,
         totalPlayers: data
       }
   });
}

edited Jan 15, 2013 at 7:21

answered Jan 15, 2013 at 7:16

Gareth Cornish

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1 Comment

XTRUST.ORG Over a year ago

Update function should be called once.

Renaud · Accepted Answer · 2013-10-22 13:18:23Z

0

It is very unclear as to why you would use such a data structure but anyway, here we go:

var jsonData = '{"data":[{"x1":"10","x2":"12","x3":"30","x4":"40","x5":"80","x6":"25"}]}';
// var cleanerJsonData = '{"x1":"10","x2":"12","x3":"30","x4":"40","x5":"80","x6":"25"}';

function update(json){
    var data = JSON.parse(json).data[0]; // why use an array here?
    // var data = JSON.parse(json) - using cleanerJsonData. 
    var streakerDataAdded = d3.map(data).entries().map(function(d){
        return {name: d.key, totalPlayers: d.value} })
    }
}

answered Oct 22, 2013 at 13:18

Renaud

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