javascript multi dimensional array

Question

I am trying to create a multidimentional arrya in javascript where I can add items in the following fashion:

var foo = {
    "Internal": {
        "0":
        {
            "pic_id":"15011",
            "description":"Picture of a cpu",
            "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
            "type":"png"
        },
            "1":{
            "pic_id":"15011",
            "description":"Picture of a cpu",
            "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
            "type":"png"
        }
    },
    "External": 
    {
        "0":
        {
            "pic_id":"15014",
            "description":"Picture of a cpu",
            "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
            "type":"png"
        }
    }
};

but I don't know how to get my value into the main category. I got the following code

vm.classificationNames = [,];

  for (var i = 0; i < vm.classificationNames.length; i++) {

                    vm.allGroupsInClassifications.push(vm.classificationNames[i]);
                }

            for (var i = 0; i < data.length; i++) {
                var item = data[i];

                if (item.classification != null) {

                } else if (item.classification == null) {

                   vm.classificationNames['Internal'][item];
                }
            }

            console.log(vm.classificationNames);

I also tried to use the following without any luck:

 vm.classificationNames['Internal'].push(item);

Does anyone know what I'd be doing wrong? thanks for the help in advance.

Also you say it's an array, but the object you show makes it seem that the "0" and "1" aren't array elements ( { } for objects vs [ ] for arrays) — Peter-Paul
– Peter-Paul, Commented Jun 2, 2017 at 8:02

Coloured Panda · Accepted Answer · 2017-06-02 08:02:05Z

Thats because its an object, not an array. Change your inner object to an array and push will work

var foo = {
    "Internal": [   // <--- Note the square braces
        {
            "pic_id": "15011",
            "description": "Picture of a cpu",
            "localion": "img.cloudimages.us/2012/06/02/mycpu.png",
            "type": "png"
        },
        {
            "pic_id": "15011",
            "description": "Picture of a cpu",
            "localion": "img.cloudimages.us/2012/06/02/mycpu.png",
            "type": "png"
        }
    ],   // <--- Note the square braces
    "External": [   // <--- Note the square braces
        {
            "pic_id": "15014",
            "description": "Picture of a cpu",
            "localion": "img.cloudimages.us/2012/06/02/mycpu.png",
            "type": "png"
        }
    ]   // <--- Note the square braces
};

foo['Internal'].push(item);

rainerhahnekamp · Accepted Answer · 2017-06-02 08:02:34Z

0

Try iterating over the dictionary with

for(var key in vm.classificationNames) {
   var entry = vm.classificationNames[entry];
   /*....*/

answered Jun 2, 2017 at 8:02

rainerhahnekamp

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