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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 indexOf method: returning the position of an element

The next method that we will implement is the indexOf method. The indexOf method receives the value of an element and returns the position of this element if it is found. Otherwise, it returns -1.

Let's take a look at its implementation:

indexOf(element) {  let current = this.head; // {1}   for (let i = 0; i < this.count && current != null; i++) { // {2}     if (this.equalsFn(element, current.element)) { // {3}      return i; // {4}    }    current = current.next; // {5}  }  return -1; // {6}} 

As always, we need a variable that will help us iterate through the list; this variable is current, and its first value is the head ({1}).

Next, we iterate through the elements ({2}), starting from the head (index ...

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Learning JavaScript Data Structures and Algorithms

Learning JavaScript Data Structures and Algorithms

Loiane Avancini

Publisher Resources

ISBN: 9781788623872Supplemental Content