Quick JavaScript Crash Course - Modern and Advanced JavaScript - Spread Operators

This video tutorial explains the REST and spread operators in JavaScript, both introduced in Ecmascript 6. The REST operator collects user-supplied values into an array, while the spread operator expands iterables into individual elements. The tutorial highlights the differences in their usage, particularly in functions, where REST is used to receive arguments and spread is used to send values. The video also provides examples of how these operators are applied in code.

What is the primary function of REST parameters in JavaScript?

• To expand iterables into individual elements

• To perform mathematical operations

• To collect user-supplied values into an array

• To concatenate strings

Which version of Ecmascript introduced the REST and spread operators?

• Ecmascript 8

• Ecmascript 7

• Ecmascript 6

• Ecmascript 5

How does the spread operator function in JavaScript?

• It expands iterables into individual elements

• It collects values into an array

• It compresses arrays into a single value

• It reverses the order of elements in an array

What is a key difference between REST and spread operators in function usage?

• Both are used for sending values

• Both are used for receiving values

• REST is used for receiving values, spread for sending

• REST is used for sending values, spread for receiving

In which part of a function is the spread operator typically used?

• In the variable declaration

• In the return statement

• In the function call

• In the function definition