Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Lernen ES6 Spread Operator | Getting Started: ES6
Introduction to React

bookES6 Spread Operator

The spread operator (…) can be easily used to assign an array's values to another array.


              
123

            
let arr = [5, 6, 7, 8, 9];
let numbers = [1, 2, 3, 4, ...arr];
console.log (numbers);
copy

Changing the position of the...arr term will change the position of data in the output:


              
123

            
let arr = [5, 6, 7, 8, 9];
let numbers = [1, 2, ...arr, 3, 4];
console.log (numbers);
copy

The spread operator … unpacks the array arr elements and places them at the location. This can be used in many flexible ways, like passing arguments to a function:


              
12345

            
let values = [1, 7, 9];
function sum(a, b, c) {
    return a + b + c;
}
console.log (sum(...values));
copy

Task

Complete the following code by creating a new array called numbers and append the elements of both even and odd arrays (in this order) to the numbers array. Do it in a single line of code.

question-icon

Fill in the gaps.

const even = [2, 4, 6, 8];
const odd = [1, 3, 5, 9];
// Write code below this line
= [,]
// White code above this line
console.log (numbers.sort ());
[1, 2, 3, 4, 5, 6, 8, 9]

Click or drag`n`drop items and fill in the blanks

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 7

Fragen Sie AI

expand

Fragen Sie AI

ChatGPT

Fragen Sie alles oder probieren Sie eine der vorgeschlagenen Fragen, um unser Gespräch zu beginnen

Suggested prompts:

Fragen Sie mich Fragen zu diesem Thema

Zusammenfassen Sie dieses Kapitel

Zeige reale Beispiele

Awesome!

Completion rate improved to 2.7

bookES6 Spread Operator

Swipe um das Menü anzuzeigen

The spread operator (…) can be easily used to assign an array's values to another array.


              
123

            
let arr = [5, 6, 7, 8, 9];
let numbers = [1, 2, 3, 4, ...arr];
console.log (numbers);
copy

Changing the position of the...arr term will change the position of data in the output:


              
123

            
let arr = [5, 6, 7, 8, 9];
let numbers = [1, 2, ...arr, 3, 4];
console.log (numbers);
copy

The spread operator … unpacks the array arr elements and places them at the location. This can be used in many flexible ways, like passing arguments to a function:


              
12345

            
let values = [1, 7, 9];
function sum(a, b, c) {
    return a + b + c;
}
console.log (sum(...values));
copy

Task

Complete the following code by creating a new array called numbers and append the elements of both even and odd arrays (in this order) to the numbers array. Do it in a single line of code.

question-icon

Fill in the gaps.

const even = [2, 4, 6, 8];
const odd = [1, 3, 5, 9];
// Write code below this line
= [,]
// White code above this line
console.log (numbers.sort ());
[1, 2, 3, 4, 5, 6, 8, 9]

Click or drag`n`drop items and fill in the blanks

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 7
some-alt