How do i convert a JSON string to an array with objects with

Question

I want to convert the following string to an array

[{id: "1", type: "railroadCrossingSign", latitude: "55.647432", longtitude: "12.187673"}, {id: "2", type: "stationSign", latitude: "55.647444", longtitude: "12.187545"}]

Unfortunately an error occurs when I am JSON.parse(), probably because of the objects in the string...

How do i convert a JSON string with objects to an array with objects?

Suren Srapyan · Accepted Answer · 2017-06-18 16:45:59Z

5

JSON format requires that your keys also must be wrapped into "".

var string = '[{"id": "1", "type": "railroadCrossingSign", "latitude": "55.647432", "longtitude": "12.187673"}, {"id": "2", "type": "stationSign", "latitude": "55.647444", "longtitude": "12.187545"}]';

var arr = JSON.parse(string);

console.log(arr);

answered Jun 18, 2017 at 16:45

Suren Srapyan

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Comments

K.Srapyan · Accepted Answer · 2017-06-18 21:36:53Z

1

In order to achieve what you want. Your JSON key value pair must in a string format too.
Say,

var obj = '[{
  "key" : "value"
}]';

Finally, when you use:

var obj = JSON.parse('{ "name":"John", "age":30, "city":"New York"}');
document.getElementById("demo").innerHTML = obj.name + ", " + obj.age;

You get the following results:

John, 30

edited Jun 18, 2017 at 21:36

K.Srapyan

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answered Jun 18, 2017 at 16:55

haMzox

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Comments

Rohìt Jíndal · Accepted Answer · 2017-06-19 06:35:09Z

Some observations :

First make sure your JSON should be a valid JSON.
Object properties should be wrapped into quotes "".

If your JSON is already an JSON Object then no need to parse it again otherwise it will throw an error.

var jsonObj = [{
	"id": "1",
	"type": "railroadCrossingSign",
	"latitude": "55.647432",
	"longtitude": "12.187673"
}, {
	"id": "2",
	"type": "stationSign",
	"latitude": "55.647444",
	"longtitude": "12.187545"
}];

var newObj = JSON.parse(jsonObj);

console.log(newObj); // Error : Uncaught SyntaxError: Unexpected token o in JSON at position 1

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