challenge-6

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Challenge 6: Word Frequency Counter

Problem Statement

Write a function CountWordFrequency that takes a string containing multiple words and returns a map where each key is a word and the value is the number of times that word appears in the string. The comparison should be case-insensitive, meaning "Hello" and "hello" should be counted as the same word.

Function Signature

func CountWordFrequency(text string) map[string]int

Input Format

• A string text containing multiple words separated by spaces, punctuation, or line breaks.

Output Format

• A map where keys are lowercase words and values are the frequency counts.

Constraints

• Words are defined as sequences of letters and digits.
• All words should be converted to lowercase before counting.
• Ignore all punctuation, spaces, and other non-alphanumeric characters.
• 0 <= len(text) <= 10000

Sample Input and Output

Sample Input 1

"The quick brown fox jumps over the lazy dog."

Sample Output 1

{
    "the": 2,
    "quick": 1,
    "brown": 1,
    "fox": 1,
    "jumps": 1,
    "over": 1,
    "lazy": 1,
    "dog": 1
}

Sample Input 2

"Hello, hello! How are you doing today? Today is a great day."

Sample Output 2

{
    "hello": 2,
    "how": 1,
    "are": 1,
    "you": 1,
    "doing": 1,
    "today": 2,
    "is": 1,
    "a": 1,
    "great": 1,
    "day": 1
}

Instructions

• Fork the repository.
• Clone your fork to your local machine.
• Create a directory named after your GitHub username inside challenge-6/submissions/.
• Copy the solution-template.go file into your submission directory.
• Implement the CountWordFrequency function.
• Test your solution locally by running the test file.
• Commit and push your code to your fork.
• Create a pull request to submit your solution.

Testing Your Solution Locally

Run the following command in the challenge-6/ directory:

go test -v