CODEWITHSUNDEEP
javascriptecmascript-6
panthro
panthro

Reputation: 24061

Set value of a key in an array of objects in ES6?

Is there a way in ES6, to set value of a key in all objects, in an array of objects to a new value.

[
    {title: 'my title', published: false},
    {title: 'news', published: true}, 
    ...
]

For example, setting every item published value to true?

Upvotes: 1

Views: 862

Answers (5)

tolotra
tolotra

Reputation: 3272

You can use the map function with spread operator

let array = [ { title: 'my title', published: false }, { title: 'news', published: true } ]

array = array.map(t => t.published !== true ? { ...t, published: true } : t)

Upvotes: 0

Syed Waqas Bukhary
Syed Waqas Bukhary

Reputation: 5340

If you don't want a loop you can refer with index.

    a = [
        {title: 'my title', published: false},
        {title: 'news', published: true}
        ]

a[0].published= true;
a[1].published= true;

or loop it

        for (val in a) {
            a[val].published = true;
        }

Upvotes: 0

gurvinder372
gurvinder372

Reputation: 68383

Use map

arr = arr.map( s => (s.published = true, s) );

Edit

No need to set the return value either, just

arr.map( s => (s.published = true, s) );

would suffice

Demo

var arr = [{
    title: 'my title',
    published: false
  },
  {
    title: 'news',
    published: true
  }
];
arr.map(s => (s.published = true, s));

console.log(arr);

Upvotes: 1

messerbill
messerbill

Reputation: 5629

I'd use a loop.

arr represents your array of objects

var result = []
for (var i = 0; i < arr.length; i++) {
  result.push([arr[i].title, arr[i].published])
}
console.log(result)

this will result in [['my Title', false], ['news', true]]

Upvotes: 1

Marko Bjelac
Marko Bjelac

Reputation: 142

The array in your example is just a one-dimensional array of objects.

You can do what you asked with forEach and a lambda:

array.forEach(element => element.published = true);

Upvotes: 3

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