Access JSONArrays in javascript

Question

I am new to JavaScript. I have done similar requirements in Java using org.json library.

I have a String:

var string = "{\"id\" :[\"\"],\"State\" :[\"TX\",\"IA\"]}";

I am converting that string to a JSONObject using this:

var obj = JSON.parse(string);

I am trying to achieve this using JavaScript or jQuery. How do i get the JSONArrays inside this JSONObject. Please help me. Thanks in advance.

Hi Rayon. But i am trying to achieve this using javascript only. Do you still think i need to add java tag? Please let me know i will add if it helps. — user7637864
– user7637864, Commented Mar 16, 2017 at 4:52
I read it wrong. You have already achieved it using JSON.parse, what is left to be achieved ? — Rayon
– Rayon, Commented Mar 16, 2017 at 4:54
you just do obj.id and you've got the array. Or obj.id.length for the length of it (should be 1 here) — Ivan
– Ivan, Commented Mar 16, 2017 at 4:55
@user7637864 that's because your id array contains one item; an empty string — Phil
– Phil, Commented Mar 16, 2017 at 5:17

Jackson Baby · Accepted Answer · 2017-03-16 05:11:05Z

2

var jsonStr = "{\"id\" :[\"\"],\"State\" :[\"TX\",\"IA\"]}";
var jsonObj = JSON.parse(jsonStr);

idArr=jsonObj.id;
stateArr=jsonObj.State;

idArr.forEach(function(id) {
    console.log(id);
});
stateArr.forEach(function(state) {
    console.log(state);
})

hope this will help you

answered Mar 16, 2017 at 5:11

Jackson Baby

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5 Comments

user7637864 Over a year ago

but the idArr.length is giving me 1. That should not be the case right?

Jackson Baby Over a year ago

idArr is a String array and it contains one empty String in its 0th index, That is why idArr.length is 1

user7637864 Over a year ago

Can you please let me know how to get rid of that Empty String. I have tried (obj.id.isEmpty()) check . But its not working. @Jackson Baby

Jackson Baby Over a year ago

stackoverflow.com/questions/281264/…

Abhay Over a year ago

Use filter stackoverflow.com/questions/19888689/…

Isaac · Accepted Answer · 2017-03-31 04:44:37Z

1

You can try this with jquery Mention jquery as :

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Code or script

var obj = $.parseJSON( '{\"id\" :[\"dddd\"],\"State\" :[\"TX\",\"IA\"]}' );
console.log(obj.id);

edited Mar 31, 2017 at 4:44

Isaac

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answered Mar 16, 2017 at 5:12

Arjun Prajapati

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1 Comment

user7637864 Over a year ago

Thanks for your response @arjun.

Skeptic Scribbler · Accepted Answer · 2017-03-16 05:05:50Z

0

So once you have got the object, you have to get the array field on which you want to perform iteration. For Ex if you want to iterate over State, Check below:

for (var i=0;i<obj.State.length;i++)
                        {
                            obj.State[i] ;
                        }

Is this what you were looking for? If not, then pls be more clear.

answered Mar 16, 2017 at 5:05

Skeptic Scribbler

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