合并两个不同json数组中的相同特定json对象

Question

I would like to merge the same specific json object on two different json arrays dependent on an json data ID.

JSON Data Set 1

{
    "Product":[
                {
                "product_id": "123",
                "location_id": "222",
                "product_code": "abc",
                },
                {
                "product_id": "456",
                "location_id": "111",
                "product_code": "xyz",
                }
            ]
}

JSON Data set 2

{
    "Location":[

            {
                "location_id": 111,
                "location_name": "alpha"
            },
            {
                "location_id": 222,
                "location_name": "tango"
            }


        ]
}

The Results would be something like this

{
    "Product":[

                {
                    "product_id": "456",
                    "location_id": "111",
                    "product_code": "xyz",
                    "location_name": "alpha"
                },
                {
                    "product_id": "123",
                    "location_id": "222",
                    "product_code": "abc",
                    "location_name": "tango"
                }
            ]
}

So far this is the code I've done.

var finalJson = {};

                    _.each(_.keys(productArray,locationArray), function(key) {
                        finalJson[key] = _.flatten(_.zip(productArray[key], locationArray[key]));
                    });

                    console.log(finalJson);

Answer 1

A simple algorithm could be using nested loops to go through both arrays, like this:

 let allProducts = [{ "product_id": "123", "location_id": "222", "product_code": "abc", }, { "product_id": "456", "location_id": "111", "product_code": "xyz", } ]; let allLocations = [ { "location_id": 111, "location_name": "alpha" }, { "location_id": 222, "location_name": "tango" } ]; let result = allProducts.map((product) => { let matchingLocation = allLocations.find((location) => { return location.location_id == product.location_id; }); return Object.assign(product, matchingLocation); }) console.log(result); 

Answer 2

Make a hashmap of the locations using location id as keys, then iterate the Product array

 let arr1 = { "Product": [{ "product_id": "123", "location_id": "222", "product_code": "abc", }, { "product_id": "456", "location_id": "111", "product_code": "xyz", }] } let arr2 = { "Location": [ { "location_id": 111, "location_name": "alpha" }, { "location_id": 222, "location_name": "tango" } ] } let locIds= _.keyBy(arr2.Location, 'location_id'); _.each(arr1.Product, (o) => _.assign(o, locIds[o.location_id])); console.log(arr1.Product) 

 .as-console-wrapper{max-height:100%!important} 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>