In this article, I am going to switch gears a bit and talk about common patterns you can use to solve problems in technical interviews. We’ll discuss the frequency counter pattern in depth to help you tackle it effectively.
What is the “Frequency Counter” pattern?
The Frequency Counter pattern uses an object or set to collect values and the frequency of those values.
This pattern is often used with an array or a string, and allows you to avoid nested loops (quadratic time complexity O(n²)).
