Fill an array in javascript inside an object

Question

i'm new to javascript and i have a little issue. I have an array like this:

name = ["Alex","John", "Mark"].

After that, i have and object with an array inside like this:

ObjectNames = {
  labels: []
}

I want to fill the labels array with the content of tha name array like this:

labels = [name[0], name[1], name[2]]

How to do this?

What you show works. You could also just have used labels : name inside the object unless you want to clone everything. — Shilly
– Shilly, Commented Mar 10, 2017 at 12:33

Larpee · Accepted Answer · 2017-03-10 12:40:44Z

3

What you did in your question already solves your problem, but you can try this:

ObjectNames = {
    labels: names
}

This will make a copy of names and store it in labels.

Let me know if it works

Edit: As Andrew Li pointed out, there's no need to use slice, as JavaScript automatically creates a copy

edited Mar 10, 2017 at 12:40

answered Mar 10, 2017 at 12:36

Larpee

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2 Comments

Andrew Li Over a year ago

Or just slice(). No argument required

Larpee Over a year ago

@Andrew Yes, I just realized that, thanks for clarifying. I've never been sure about when Javascript makes a copy and when it doesn't

m87 · Accepted Answer · 2017-03-10 12:41:38Z

2

You could do it like this :

var _name = ["Alex","John", "Mark"];
var ObjectNames = {
  labels: []
};
_name.forEach(function(e) {
  ObjectNames.labels.push(e);
});
console.log(ObjectNames.labels);

edited Mar 10, 2017 at 12:41

answered Mar 10, 2017 at 12:36

m87

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Comments

Anik Islam Abhi · Accepted Answer · 2017-03-10 12:36:59Z

1

There are lots of way you can do that

Try like this

var ObjectNames = {
  labels: [name[0], name[1], name[2]]
}

or

var ObjectNames = {
  labels: name
}

or

var ObjectNames = {
  labels: name.slice()
}

or

ObjectNames = {
  labels: []
}

ObjectNames.labels=name ;

or like this

for(var i=0;i<name.length;i++)
  ObjectNames.labels.push(name[i])

or

name.forEach(x=> ObjectNames.labels.push(x))

edited Mar 10, 2017 at 12:36

answered Mar 10, 2017 at 12:33

Anik Islam Abhi

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1 Comment

RamAlx Over a year ago

i want to do this with a for loop not like that

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