Combining two items from separate arrays

How can I efficiently merge objects that share the same index in two different arrays of objects?

Below is the first array

const countries = [
    {
        "name": "Sweden",
        "nativeName": "Sverige"
    },
    {
        "name": "Norway",
        "nativeName": "Norge"
    },
    {
        "name": "Iceland",
        "nativeName": "Ísland"
    }
]

And here is the second array

const countryCodes = [
    {
        "country_id": "SE",
    },
    {
        "country_id": "NO",
    },
    {
        "country_id": "IS",
    }
]

The desired output should be:


const countriesAndCodes = [
    {
        "name": "Sweden",
        "country_id": "SE",
        "nativeName": "Sverige"
    },
    {
        "name": "Norway",
        "country_id": "NO",
        "nativeName": "Norge"
    },
    {
        "name": "Iceland",
        "country_id": "IS",
        "nativeName": "Ísland"
    }
]
javascript

Answer №1

Here is one approach:

countries
  .map((country, index) => {
    const countryCode = countryCodes[index];
    const mergedCountry = ...; // Implement any method to combine the two objects
    return mergedCountry;
  })

Alternatively, using a zip function from a library like Lodash could be a more efficient choice.

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