JavaScript Destructuring and Spread Syntax Quiz
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Questions and Answers

Which ECMAScript specification introduced destructuring, rest parameters, and spread syntax in JavaScript?

  • ECMAScript 2018 Edition
  • ECMAScript 2015 Edition (correct)
  • ECMAScript 2017 Edition
  • ECMAScript 2016 Edition
  • What do destructuring, rest parameters, and spread syntax provide in JavaScript?

  • A way to create new arrays and objects
  • More direct ways of accessing the members of an array or an object (correct)
  • A way to convert objects into arrays
  • A way to convert arrays into objects
  • Which of the following is NOT a feature introduced by the ECMAScript 2015 Edition?

  • Spread syntax
  • Rest parameters
  • Arrow functions (correct)
  • Destructuring
  • What is the purpose of rest parameters in JavaScript?

    <p>To capture multiple function arguments</p> Signup and view all the answers

    Which languages may not have corresponding syntax for destructuring, rest parameters, and spread in JavaScript?

    <p>Java</p> Signup and view all the answers

    Study Notes

    ECMAScript Specification and Features

    • The ECMAScript 2015 Edition introduced destructuring, rest parameters, and spread syntax in JavaScript.

    Benefits of Destructuring, Rest Parameters, and Spread Syntax

    • Destructuring, rest parameters, and spread syntax provide a more concise and expressive way of working with data in JavaScript.

    Features NOT Introduced by ECMAScript 2015 Edition

    • None of the above options (destructuring, rest parameters, and spread syntax) are NOT features introduced by the ECMAScript 2015 Edition.

    Purpose of Rest Parameters

    • Rest parameters allow for the capture of multiple arguments into a single array parameter in a function.

    Languages without Corresponding Syntax

    • Languages like C, C++, and Java may not have corresponding syntax for destructuring, rest parameters, and spread in JavaScript.

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    Description

    Test your knowledge of JavaScript's destructuring, rest parameters, and spread syntax with this quiz. Learn how to efficiently work with arrays and objects in JavaScript.

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