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I am trying to build a web project where I get details in JSON format, for example:
{
"file_id": 333,
"t": "2016-03-08 12:00:56"
}
I was trying to show the output in d3 js bar chart. The problem I am facing is the code I've got is working for a JSON file but not for an object deserialized from the JSON. Can any one help me out with this?
The part of the working script for JSON file is this:
d3.json("FILENAME", function(error, data) {
data = JSON.parse(data);
x.domain(data.map(function(d) { return d.letter }));
y.domain([0, d3.max(data, function(d) { return d.frequency })]);
If I change the filename to an object its not working.
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I've done some research and I understood that "duplicate" keys in JSON are legal, but different parsers act differently in handling this. How can I avoid the use of duplicate keys or, alternatively, make sure the schema validates the value for all duplicated keys? Hermann.
It has no special meaning to JSON. This particular data uses it as a key string.
Use the JavaScript function JSON.parse() to convert text into a JavaScript object: const obj = JSON.parse('{"name":"John", "age":30, "city":"New York"}'); Make sure the text is in JSON format, or else you will get a syntax error.
being a JS library D3 works with the JS objects(along with other JS data types) only, d3.json is just a method to load the object from an external file. So if you dont need to load data from external file then dont use d3.json
//d3.json("FILENAME", function(error, data) {
//data = JSON.parse(data);
var data = {
"file_id": 333,
"t": "2016-03-08 12:00:56"
}; //your own object
x.domain(data.map(function(d) { return d.file_id}));
y.domain([0, d3.max(data, function(d) { return d.t})]);
hope it helps
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