Exploring Data within Data Structures

I am currently making two JSON requests in my code:

d3.json("path/to/file1.json", function(error, json) {

   d3.json("path/to/file2.json", function(error, json2) {

   });
});

The structure of json 2 looks like this:

[ 
  { "city" : "LA",
    "locations" : [ { "country" : "USA", "x" : 0, "y" : 0 } ] 
  }, 
  { "city" : "London",
    "locations" : [ { "country" : "UK", "x" : 0, "y" : 0 } ]
  }
  ... 
]

Currently, I'm trying to access the x & y values from json2. However, the issue I face is that I want to use both json and json2 in my variable:

var node = svg.selectAll("a.node")
 .data(json.cars)
 .enter().append("a")
 .attr("class", "node")
 ;

Here, I need to fetch x & y positions ONLY from json2

node.attr("transform", function(d, i) {
    return "translate(" + d.x + "," + d.y + ")";
});

node.append('path') 
    .attr("d", d3.svg.symbol().type(function(d) { return shape[d.name]; }).size(120))
    .style("fill", function(d) { return colors[d.name]; } );

I have attempted the following:

node.attr("transform", function(d,i) {
    return "translate(" + json2.locations[d].x + "," + json2.locations[d].y + ")";
});

But it didn't work. Any assistance would be appreciated - Thank you.

Answer №1

To retrieve the x variable for LA, USA from the array of locations, you must first identify and select the object containing the locations data. The locations array itself consists of objects, requiring an index to access specific elements. Use the following code snippet to obtain the x value for LA, USA:

json2[0].locations[0].x

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