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Learning JavaScript Data Structures and Algorithms - Third Edition
book

Learning JavaScript Data Structures and Algorithms - Third Edition

by Loiane Avancini
April 2018
Beginner to intermediate content levelBeginner to intermediate
426 pages
10h 19m
English
Packt Publishing
Content preview from Learning JavaScript Data Structures and Algorithms - Third Edition

ECMAScript 6 and new array functionalities

As you learned in Chapter 1, JavaScript – A Quick Overview, the JavaScript language has new functionalities according to the ECMAScript 2015 (ES6 or ES2015) and newer specifications (2015+).

The following is a list of the new methods added in ES2015 and ES2016:

Method

Description

@@iterator

Returns an iterator object that contains the key/value pairs of the array that can be synchronously called to retrieve key/value of the array elements.

copyWithin

Copies a sequence of values of the array into the position of a start index.

entries

Returns @@iterator, which contains key/value pairs.

includes

Returns true if an element is found in the array, and false otherwise. This ...

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Learning JavaScript Data Structures and Algorithms

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Publisher Resources

ISBN: 9781788623872Supplemental Content