Introduction

Welcome! Today, you'll explore handling and manipulating strings in Go, a fundamental skill in many programming areas. Specifically, you'll learn how to identify consecutive groups of identical characters in a string. Excited to enhance your skills? Let's dive in!

Task Statement

In this lesson, your objective is to write a Go function that takes a string as input and identifies all consecutive groups of identical characters within it. A group is a segment of text wherein the same character is repeated consecutively.

Your function should return a slice of structs. Each struct will consist of the repeating character and the length of its repetition. For example, if the input string is "aaabbcccaae", your function should output: {'a':3, 'b':2, 'c':3, 'a':2, 'e':1}.

Important constraints:

  • Only alphanumeric characters (letters and digits) are considered for grouping.
  • Case is significant: uppercase and lowercase letters are treated as different characters (e.g., 'A' and 'a' form separate groups).
  • Non-alphanumeric characters are skipped entirely and do not affect group formation.

Ready to discover how to accomplish this task? Let's get started!

Step 1: Initialization

To solve a problem, it's crucial to first establish our scope by taking preliminary steps. We'll start by defining a charGroup struct to hold character group data — Character for the character, and Length for its repetition count. Then, we'll initialize an empty slice to store our results. We'll also declare two variables, and , which will help us monitor the character of the current group and the length of its consecutive sequence.

Sign up
Join the 1M+ learners on CodeSignal
Be a part of our community of 1M+ users who develop and demonstrate their skills on CodeSignal