Count Occurrences
Explore how to count the number of times a specific data value appears in a singly linked list. Understand both iterative and recursive methods, see detailed Python code examples, and learn to apply these approaches to traverse and analyze linked lists effectively.
We'll cover the following...
In this lesson, we investigate how to count the occurrence of nodes with a specified data element. We will consider how one may solve this problem in both an iterative and recursive manner, and we will code the solution to both of these approaches in Python.
As an example, have a look at the illustration below where we have a linked list with the following elements:
1 - 1 - 2 - 1
You can see that the number of occurrences of 1 in the linked list is 3.
Iterative Implementation #
Our approach to iteratively solving this problem is straightforward. We’ll traverse the linked list and count the occurrences as we go along. Let’s go ahead and code it in Python!