Want to add an array of objects inside a nested object: Javascript

Question

I need to add an array of objects to another object whose structure has been shown below.

Here arr is the array of objects that needs to be added to "dest" object.

Help would be appreciated.

Structure:

var arr = [
    { field: "state", value: "value2"},
    { field: "city", value: "value3"}
];
    

This array of objects needs to be added to an object of following structure:

var dest = {
    "topic": "test",
    "filter": {
        "sequence": [
            {
                "field": "country",
                "value": "value1",
            }
        ]
    },
    "order": [
        {
            "field": "field1",
            "order": "backward"
        }
    ]
}

I would want to add the fields of arr inside sequence so that result would be something like this:

var dest = {
    "topic": "test",
    "filter": {
        "sequence": [
            {
                "field": "country",
                "value": "value1",
            },
            {
                "field": "state",
                "value": "value2",
            },
            {
                "field": "city",
                "value": "value3",
            }
        ]
    },
    "order": [
        {
            "field": "field1",
            "order": "backward"
        }
    ]
}

Answer 1

Using forEach() you can do it.

var arr = [
    { field: "state", value: "value2"},
    { field: "city", value: "value3"}
];

var dest = {
    "topic": "test",
    "filter": {
        "sequence": [
            {
                "field": "country",
                "value": "value1",
            }
        ]
    },
    "order": [
        {
            "field": "field1",
            "order": "backward"
        }
    ]
}

arr.forEach(function (item) {
    dest.filter.sequence.push(item)
});

console.log(dest)

Also ES6 spread operator can be used to merge

var arr = [
    { field: "state", value: "value2"},
    { field: "city", value: "value3"}
];

var dest = {
    "topic": "test",
    "filter": {
        "sequence": [
            {
                "field": "country",
                "value": "value1",
            }
        ]
    },
    "order": [
        {
            "field": "field1",
            "order": "backward"
        }
    ]
}
    
dest.filter.sequence.push(...arr)

console.log(dest)

Answer 2

You just need to use below code to insert array into object.

        arr.forEach( function(value, index, array) {
            dest.filter.sequence.push(value);
        });