How to add properties inside an object by calling function in javascript

Question

Given below is an object stored in variable nestedObject. Inside this object, you can see a property with keyname countries with 1 object value (switzerland). I want to create a function with 4 arguments: object,countryName, capital, population which adds a new key-value pair inside countries object and return the value of a newly inserted key. The key being countryName and value, an object with properties as shown in the example.

I want to Create a new function to add country with the name, capital, and population as parameters ---Then Call the function with given parameter values ---Return the result in the output variable

Given below is the format of the object which will be passed as the argument.

  speakers: [{ name: "Elie" }, { name: "Tim" }, { name: "Matt" }],
  data: {
    continents: {
      europe: {
        countries: {
          switzerland: {
            capital: "Bern",
            population: 38000000
          }
        }
      }
    },
    languages: {
      spanish: {
        hello: "Hola"
      },
      french: {
        hello: "Bonjour"
      }
    }
  }
}```

developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — KooiInc
– KooiInc, Commented May 3, 2020 at 8:51

fcdt · Accepted Answer · 2020-09-17 09:09:40Z

1

You can use Object.assign for this purpose (reference).

Your question can be done using assign as

var countryName={capital:capital,population:population};
const ans=Object.assign(object.data.continents.europe.countries,countryName);

edited Sep 17, 2020 at 9:09

fcdt

2,5215 gold badges17 silver badges27 bronze badges

answered Sep 17, 2020 at 7:43

AJAY BUDHEWAR

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