If I push objects created on the fly, including another internal array of objects, to an array, how can I add objects only to a specific object's array. Using Reviews for example:

reviews.push({ 'reviewer' : 'John', 
               'review' : 'This movie was the greatest', 
               'ments' : { 'menter' : 'Dave',
                              'ment' : 'The review by John was too short'} 
             });

'ments' being the internal array of objects.

If at a later stage I want to add objects only to a specific object's 'ments' by it's parents name/ID, is it possible? And if so how would I go about doing it?

Using the example, If there is only 1 review with multiple ments, and the ments e at a later stage, how can I add new ments to the 'ments' array within the review object?

I am guessing I would need to have a review ID to stop duplicates etc, but that aside I'm not even sure syntactically how to do it or if it's even possible.

Thanks in advance.

If I push objects created on the fly, including another internal array of objects, to an array, how can I add objects only to a specific object's array. Using Reviews for example:

reviews.push({ 'reviewer' : 'John', 
               'review' : 'This movie was the greatest', 
               'ments' : { 'menter' : 'Dave',
                              'ment' : 'The review by John was too short'} 
             });

'ments' being the internal array of objects.

If at a later stage I want to add objects only to a specific object's 'ments' by it's parents name/ID, is it possible? And if so how would I go about doing it?

Using the example, If there is only 1 review with multiple ments, and the ments e at a later stage, how can I add new ments to the 'ments' array within the review object?

I am guessing I would need to have a review ID to stop duplicates etc, but that aside I'm not even sure syntactically how to do it or if it's even possible.

Thanks in advance.

• javascript

• 1 ments is an object at the moment, should it be wrapped in [ .. ]? – Russ Cam Commented Aug 16, 2013 at 9:18

3 Answers 3

First off, ments should be an array and you have an object.

Then proceed like this:

reviews[someIndex].ments.push( { menter: 'john', ment: 'hello!!'});

I.e.

if you need to add a ment to the first post do:

reviews[0].ments.push( { /* your ment */ } );

EDIT : I always used get() to retrieve an index but I seem to not be able to find much documentation about it, so I'm assuming (though I'm not sure) that [i] is a more standard way of doing things, hence why I changed the example. However the concept of pushing into ments doesn't change.

EDIT 2: OP wants to target a particular element in an array. I would use Array.prototype.indexOf as described here where you can find a solution for browsers that do not support indexOf as well.

If you want to keep track of the reviews and ments by id's I'd do something like:

var reviews = {};
review_id = "#1234";
reviews[review_id] = {
    "reviewer": "John",
    "review": "This movie was the bestest",
    "ments": {
        "#456": {
            "menter": "HAL 9000",
            "ment": "I'm afraid I can't let you do that Dave"
        }
    }
};

Adding a ment:

reviews[review_id].ments[ment_id] = { /* .. */ };

for(var i=0;i<reviews.length;i++){
if(reviews[i]["reviewer"]=="John"){
   var count=Object.keys(reviews[i].ments).length/2;
   reviews[i].ments["menter"+(count+1)]="another menter";
   reviews[i].ments["ment"+(count+1)]="some other ment";
   console.log(count);
}
}

output

menter "Dave"

ment "The review by John was too short"

menter2 "another menter"

ment2 "some other ment"

http://jsfiddle/gkxcj/