“how to access array of objects in javascript” Code Answer’s
The objective of the Array object is to collect multiple values in a single variable. But the size of these values should be fixed and the types must be the same.
The declaration of the array is mostly done through the const keyword.
Array objects are created as following syntax:
on Jun 24, 2022
const array_name =[item1, item2, ...];
You should have to use ordinal numbers to get access. you can set values inside an array as follows:
item[0] is the first element
item[1] is the second element
item[2] is the third element0
javascript array
on Jan 01, 1970
//create an array like so:
var colors = ["red","blue","green"];
//you can loop through an array like this:
for (var i = 0; i < colors.length; i++) {
console.log(colors[i]);
}0
how to access array of objects in javascript
on Jan 01, 1970
var events = [
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 1
},
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 2
},
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 3
}
];
console.log(events[0].place);0
arrays inside array of objects
on Jan 01, 1970
var response = {data: [{users: [1,2,3]}, {users: [4,5,6]}]}
var users = response.data.map(o => o.users)
const usersCollection = [].concat(...users)
console.log(usersCollection)0
how to access array of objects in javascript
on Jan 01, 1970
async function getData() {
const response = await fetch('https://jsonplaceholder.typicode.com/users');
const data = await response.json();
const {
id = data[1]['id'],
name = data[1]['name'],
username = data[1]['username'],
email = data[1]['email'],
address = data[1]['address']
} = data
console.log(id)
console.log(name)
console.log(email)
console.log(username)
console.log(address)
}
getData();
}0
how to access array of objects in javascript
on Jan 01, 1970
Accessing nested data structures
A nested data structure is an array or object which refers to other arrays or objects, i.e. its values are arrays or objects. Such structures can be accessed by consecutively applying dot or bracket notation.
Here is an example:
const data = {
code: 42,
items: [{
id: 1,
name: 'foo'
}, {
id: 2,
name: 'bar'
}]
};
Let's assume we want to access the name of the second item.
Here is how we can do it step-by-step:
As we can see data is an object, hence we can access its properties using dot notation. The items property is accessed as follows:
data.items
The value is an array, to access its second element, we have to use bracket notation:
data.items[1]
This value is an object and we use dot notation again to access the name property. So we eventually get:
const item_name = data.items[1].name;
Alternatively, we could have used bracket notation for any of the properties, especially if the name contained characters that would have made it invalid for dot notation usage:
const item_name = data['items'][1]['name'];0
Hope you have learned how to get access to an array of objects in javascript. Feel free to ask any question in the comment box.
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