What is the “spread” operator in ES6?

1.	What is the “spread” operator in ES6?
Answer» The list of parameters is OBTAINED using the spread operator. Three dots (...) are used to represent it. The spread operator divides an iterable (such as an array or a string) into individual elements. It's mostly used in JavaScript to make shallow copies of JS. It improves the READABILITY of your code by making it more concise. The spread operator can be used to join two ARRAYS together or to concatenate them. let arr1 = [4, 5, 6]; let arr2 = [1, 2, 3, ...arr1, 7, 8, 9, 10]; console.log(arr2); Output: [ 1 2 3 4 5 6 7 8 9 10 ]

Answer»

The list of parameters is OBTAINED using the spread operator. Three dots (...) are used to represent it. The spread operator divides an iterable (such as an array or a string) into individual elements. It's mostly used in JavaScript to make shallow copies of JS. It improves the READABILITY of your code by making it more concise.

The spread operator can be used to join two ARRAYS together or to concatenate them.

let arr1 = [4, 5, 6]; let arr2 = [1, 2, 3, ...arr1, 7, 8, 9, 10]; console.log(arr2);

Output:

[ 1 2 3 4 5 6 7 8 9 10 ]

Discussion

No Comment Found

Related InterviewSolutions

What is the result of the spread operator array shown below?
How do you use Destructuring Assignment to swap variables?
Compare the ES5 and ES6 codes for object initialization and parsing returned objects.
Name some string functions introduced in ES6.
Name some array methods that were introduced in ES6.
What is Babel?
What is the reason behind adding Symbol to ES6?
What is the difference between for..of and for..in?
What is Bubbling and Capturing?
Which keyword can be used to deploy inheritance in ES6?