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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

The clear, size, isEmpty, and toString methods

The size method returns how many values are stored in the dictionary. We can retrieve all the keys from the table object using the Object.keys method (the same as we did in the keyValues method). The code for the size method is declared as follows:

size() {  return Object.keys(this.table).length;}

We could also evoke the keyValues method and return the length of the returned array (return this.keyValues().length).

To verify whether the dictionary is empty, we can retrieve its size and see whether it is zero. If the size is zero, it means the dictionary is empty. This logic is implemented in the isEmpty method as follows:

isEmpty() {  return this.size() === 0;}

To clear the dictionary, we can simply ...

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Learning JavaScript Data Structures and Algorithms

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Publisher Resources

ISBN: 9781788623872Supplemental Content