Filter empty arrays from object of arrays in JS

Question

I have an array of objects

{
   "name":"DLF Shop",
   "merchant_code":"EM499751e",
   "address":"Link Rd, Dhaka 1205, Bangladesh",
   "longitude":90.3937913,
   "latitude":23.7456808,
   "mother_shop_slug":"test-qa-26f7d03d",
   "shop_type":"regular",
   "key_personnel":[
      {
         "name":"",
         "designation":"",
         "phone_no":"",
         "email":""
      }
   ],
   "category_head":[
      {
         "username":""
      }
   ],
   "bdm":[
      {
         "username":""
      }
   ],
   "kam":[
      {
         "username":""
      }
   ],
   "vm":[
      {
         "username":""
      }
   ],
   "organisation_type":"small",
   "is_mother_shop":false,
   "is_delivery_hero_allowed":false,
   "is_cod_allowed":false
}

I want to filter out all the empty arrays in this object. So, after filtering in the newly created object there will be no empty arrays or any empty key in this object.

Answer 1

var str = '{"name":"DLF Shop","merchant_code":"EM499751e","address":"Link Rd, Dhaka 1205, Bangladesh","longitude":90.3937913,"latitude":23.7456808,"mother_shop_slug":"test-qa-26f7d03d","shop_type":"regular","key_personnel":[{"name":"","designation":"","phone_no":"","email":""}],"category_head":[{"username":""}],"bdm":[{"username":""}],"kam":[{"username":"testforthis"}],"vm":[{"username":""}],"organisation_type":"small","is_mother_shop":false,"is_delivery_hero_allowed":false,"is_cod_allowed":false}';
    let json = JSON.parse(str);


    cleanObject = function(object) {
    Object
        .entries(object)
        .forEach(([k, v]) => {
            if (v && typeof v === 'object')
                cleanObject(v);
            if (v && 
                typeof v === 'object' && 
                !Object.keys(v).length || 
                v === null || 
                v === undefined ||
                v.length === 0
            ) {
                if (Array.isArray(object))
                    object.splice(k, 1);
                else if (!(v instanceof Date))
                    delete object[k];
            }
        });
    return object;
}

let newobj = cleanObject(json);
console.log(newobj);

From https://stackoverflow.com/a/52399512/1772933

Answer 2

You could take

• filtering for arrays
• filtering for objects

and get only the properties with values unequal to ''.

const
    filter = data => {
        if (Array.isArray(data)) {
            const temp = data.reduce((r, v) => {
                v = filter(v);
                if (v !== '') r.push(v);
                return r;
            }, []);
            return temp.length
                ? temp
                : '';
        }
        if (data && typeof data === 'object') {
            const temp = Object.entries(data).reduce((r, [k, v]) => {
                v = filter(v);
                if (v !== '') r.push([k, v]);
                return r;
            }, []);
            return temp.length
                ? Object.fromEntries(temp)
                : '';
        }
        return data;
    },
    data = { name: "DLF Shop", merchant_code: "EM499751e", address: "Link Rd, Dhaka 1205, Bangladesh", longitude: 90.3937913, latitude: 23.7456808, mother_shop_slug: "test-qa-26f7d03d", shop_type: "regular", key_personnel: [{ name: "", designation: "", phone_no: "", email: "" }], category_head: [{ username: "" }], bdm: [{ username: "" }], kam: [{ username: "" }], vm: [{ username: "" }], organisation_type: "small", is_mother_shop: false, is_delivery_hero_allowed: false, is_cod_allowed: false },
    result = filter(data);

console.log(result);

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