Question

I have the following javascript object:

result = {
    "banking6dig":{
        "GM-B-001":{
            "releaseDate":"2/2/2012 14:44","noOfHex":"3","versInfo":"6 digit Banking"
        },
        "GM-B-002":{
            "releaseDate":"1/2/2012 14:46","noOfHex":"3","versInfo":"6 digit Banking with changes"
        }
    },
    "paynpark":[]
} 

Explanation:

“banking6dig” and “paynpark” are applications
“banking6dig” has two subversions : “GM-B-001” and “GM-B-002”
“paynpark” has no subversions.

Additionally, each subversion has its own properties,viz, “releaseDate”, “noOfHex”, and “versInfo”.

This object “result” is built after a php request, so it can have any number of apps and subversions; the format, however is ALWAYS the same.

I have tried this on jsFiddle: http://jsfiddle.net/2JLtZ/1/

1. How do I find out the number of “subversions” in each “app”? (I get some 40 “subversions”!)
2. How do I add an app to the object “result”, e.g., “electricity” with its properties reset?
3. How do I add a subversion to “paynpark”, e.g. “fixedRate”?
4. How do I modify a subversions properties, for example change “releaseDate” of “GM-B-001” to “3/12/2012 14:46”?

Answer 1

1.

var i=0;
for (var j in result['banking6dig']) i++;
alert('banking6dig has '+i+' subversions'):

2.

result.electricity={}

3.

paynpark.fixedRate={};

Thanks AlienWebguy for pointing this out.

4.

result['banking6dig']["GM-B-001"]["releaseDate"]="3/12/2012 14:46";