how to build javascript object dynamically with array values

Question

I need to create the object property from array values and assign some values to that for example

var main_obj = {};
var dynamic_array = ["value1", "value2", "value3", "value4"];

From dynamic_array I need to create main_obj like:

main_obj[value1][value2][value3] = some_value;

Please give me some suggestions.

where are values coming from? This question is really lacking in detail — charlietfl
– charlietfl, Commented Oct 27, 2014 at 14:11
@charlietfl Am getting the values at run-time and push into the dynamic_array — Troy
– Troy, Commented Oct 28, 2014 at 5:00
actually my main_obj = {"value1":{"value2":{"value3":}}} is like this what i need to do is i need to parse through until value3 and add the new object, the dynamic_array is a reference for how long i need to parse. — Troy
– Troy, Commented Oct 28, 2014 at 6:02

Sebastian Metzger · Accepted Answer · 2014-10-27 14:13:53Z

0

dynamic_array.forEach(function(prop){
   main_obj[prop] = some_value;  
});

answered Oct 27, 2014 at 14:13

Sebastian Metzger

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miglio · Accepted Answer · 2014-10-27 14:44:39Z

0

this is another way

var dynamic_array = ["value1","value2","value3"];
var value = 'your value';

function createobj(dynamic_array,value){
    var count = dynamic_array.length;
    var text= '';
    var ended = '';
    for(var i = 0; i < count; i++){
      text += '{"'+dynamic_array[i]+'":';
      ended +='}';
    }
    text += '"'+value+'"'+ended;
    return JSON.parse(text);
}
console.log(createobj(dynamic_array,value));

answered Oct 27, 2014 at 14:44

miglio

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2 Comments

Troy Over a year ago

actually my main_obj = {"value1":{"value2":{"value3":}}} is like this what i need to do is i need to parse through until value3 and add the new object, the dynamic_array is a reference for how long i need to parse. thanks

Troy Over a year ago

actually my main_obj = {"value1":{"value2":{"value3":}}} is like this what i need to do is i need to parse through until value3 and add the new object, the dynamic_array is a reference for how long i need to parse.

Andrea Tondo · Accepted Answer · 2014-10-28 10:19:22Z

0

Trying to interpretate your question, this may be a solution to what you are looking for:

function createNestedProperties(obj, array, value) {
    var result = {};
    var result_tmp = obj;
    var i = 0;
    while (i < array.length) {
        if (i < (array.length - 1))
            result_tmp[array[i]] = {};
        else
            result_tmp[array[i]] = value;
        result_tmp = result_tmp[array[i]];
        i++;
    }
    return obj;
}

used this way:

var main_obj = {"value1":{"value2":{"value3":{}}}};
var dynamic_array = ["value1", "value2", "value3"];

main_obj = createNestedProperties(main_obj, dynamic_array, {"value_Z":"new value"});

Resulting object:

{"value1":{"value2":{"value3":{"value_Z":"new value"}}}}

This function would override existing properties in main_obj if already there.

edited Oct 28, 2014 at 10:19

answered Oct 27, 2014 at 14:24

Andrea Tondo

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1 Comment

Andrea Tondo Over a year ago

@Troy I have slightly updated the above code, using that function you will be able to set a new {...} object to "value3" property (possibly overriding an existing value if present).

Community · Accepted Answer · 2017-05-23 11:49:39Z

0

i parse through the object recursively rather than building that jQuery - How to recursively loop over an object's nested properties?

    function recursiveIteration(main_obj) {
        for (var property in main_obj) {
            if (property == value3)
            {
                main_obj[property] = {"value4":test};
            }
            else
            {
                recursiveIteration(main_obj[property]);
            }
        }
    }
    recursiveIteration(main_obj);

edited May 23, 2017 at 11:49

CommunityBot

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answered Oct 30, 2014 at 8:22

Troy

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1 Comment

Andrea Tondo Over a year ago

That's not an absolute solution, only works with fixed property, should not be preferred to other (more correct) suggested ones.

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