Add solution for Challenge 19 by koki1610168

[koki1610168]

Challenge 19 Solution

Submitted by: @koki1610168
Challenge: Challenge 19

Description

This PR contains my solution for Challenge 19.

Changes

• Added solution file to challenge-19/submissions/koki1610168/solution-template.go

Testing

• Solution passes all test cases
• Code follows Go best practices

Thank you for reviewing my submission! 🚀

[coderabbitai]

Walkthrough

A new Go solution file is introduced for Challenge 19 containing four slice utility functions: FindMax (returns maximum value), RemoveDuplicates (preserves order while removing duplicates), ReverseSlice (returns reversed slice), and FilterEven (filters even numbers). A main function demonstrates each function's usage with sample data.

Changes

Cohort / File(s)	Summary
Challenge 19 Submission challenge-19/submissions/koki1610168/solution-template.go	Added four slice utility functions: FindMax returns max integer with 0 for empty slices, RemoveDuplicates removes duplicates while preserving order, ReverseSlice reverses slice order, FilterEven filters even numbers. Main function demonstrates all four functions with sample data (84 lines added).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• PR #716: Adds identical four slice utility functions (FindMax, RemoveDuplicates, ReverseSlice, FilterEven) for Challenge 19 with matching signatures and main demonstration.
• PR #816: Adds same four utility functions for Challenge 19 to a different submission file with identical code-level implementation.
• PR #1070: Adds the same set of slice-utility functions to another Challenge 19 submission file location.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically identifies the main change: adding a solution file for Challenge 19 by a specific contributor.
Description check	✅ Passed	The description is directly related to the changeset, clearly explaining the Challenge 19 solution submission with details about what was added.
Docstring Coverage	✅ Passed	Docstring coverage is 80.00% which is sufficient. The required threshold is 80.00%.

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[github-actions]

🎉 Auto-merged!

This PR was automatically merged after 2 days with all checks passing.

Thank you for your contribution, @koki1610168!