CODEWITHSUNDEEP
javascript
Exception
Exception

Reputation: 8379

How to add another object to this object

I am new to JSON and Here is my First JSON Object 

var First = {
              "a" : [{}]
            };

I want to add the below object to "a" in "First"

var a = {"1":"One","2":"Two"};

I have tried below code 

First.a[First.a.length-1] = a;

It is not working.I assume that there are some syntax mistakes in this. Please help me on this.

Upvotes: 1

Views: 186

Answers (3)

Guffa
Guffa

Reputation: 700192

That's not a "JSON object". There isn't even any such thing. It's a Javascript object.

It's not working as you expect as you are not adding an item to the array, you are replacing the last item.

Just use the push method to add an item at the end of the array:

First.a.push(a);

Upvotes: 1

jbabey
jbabey

Reputation: 46647

You should use Array.push().

var myObject = { 
    myArrayOfObjects: []
};

var newObject = { 
    1: '1',
    2: '2'
};

myObject.myArrayOfObjects.push(newObject);

Upvotes: 1

Guillaume86
Guillaume86

Reputation: 14400

it you want to add it, you're looking for First.a.push(a) if you want to replace the last element: 

First.a[First.a.length-1] = a;

if you want to append a to the last element:

First.a[First.a.length-1]['a'] = a;

or

  First.a[First.a.length-1].a = a;

if it's none of these, please add the expected json in your question.

Upvotes: 1

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