Convert array of object to array of values of specific key

Question

My object look something like this.

var fruits = [
    {
        name: 'apple',
        color: 'golden'
    },
    {
        name: 'pear',
        color: 'green'
    },
    {
        name: 'mango',
        color: 'yellow'
    }
]

Now what i want is an array of the names of the fruit from the fruit object

console.log(getFruitNames(fruits)) //['apple','pear','mango']

What have you tried so far to solve this? The problem you describe is trivial and I'd expect you to be able to find at least a working solution. — fjc
– fjc, Commented Sep 26, 2021 at 11:34

J.F. · Accepted Answer · 2021-09-26 11:41:20Z

1

You only need a map to return each name.

var fruits = [
    {
        name: 'apple',
        color: 'golden'
    },
    {
        name: 'pear',
        color: 'green'
    },
    {
        name: 'mango',
        color: 'yellow'
    }
]

console.log(getFruitNames(fruits))

function getFruitNames(fruits){
  return fruits.map(m => m.name)
}

Also a TS playgorund

edited Sep 26, 2021 at 11:41

answered Sep 26, 2021 at 11:34

J.F.

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Comments

Ran Turner · Accepted Answer · 2021-09-26 11:44:32Z

Array.prototype.map() is what you need.

It will create a new array populated with the results of calling the provided function on every element in the calling array.

var fruits = [
    {
        name: 'apple',
        color: 'golden'
    },
    {
        name: 'pear',
        color: 'green'
    },
    {
        name: 'mango',
        color: 'yellow'
    }
];


console.log(fruits.map(x => x.name))

more about map can be found here : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

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