Add solution for Challenge 2 by AlexO-85

[AlexO-85]

Challenge 2 Solution

Submitted by: @AlexO-85
Challenge: Challenge 2

Description

This PR contains my solution for Challenge 2.

Changes

• Added solution file to challenge-2/submissions/AlexO-85/solution-template.go

Testing

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

Thank you for reviewing my submission! 🚀

[coderabbitai]

Walkthrough

Adds a new Go program in a challenge submission directory that reads a line from standard input, reverses it by converting to a rune slice and swapping from both ends, and prints the result. Exposes a public ReverseString function implementing the core reversal logic.

Changes

Cohort / File(s)	Summary
String Reversal Solution challenge-2/submissions/AlexO-85/solution-template.go	New file adding public ReverseString(s string) string function that reverses input strings using rune slice conversion and two-pointer in-place swapping. Includes main function that reads stdin, reverses the input, and prints the result.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Straightforward rune-based string reversal with basic two-pointer swap logic
• Single new submission file with minimal error handling (only checks scanner.Scan once)
• No complex control flow or edge case handling beyond standard Unicode support via runes

Possibly related PRs

• Add solution for Challenge 2 by redstrike #596: Adds identical exported ReverseString function with rune-based two-pointer reversal logic in a different submission path.
• Add solution for Challenge 2 by macborowy #572: Implements the same ReverseString function and main program pattern (read, reverse using rune-swap, print output) for challenge-2.
• Add solution for Challenge 2 by fzzv #635: Adds ReverseString function and solution-template.go for Challenge 2 with stdin/stdout handling, though using different reversal approach.

Pre-merge checks

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies that this PR adds a solution for Challenge 2 by a specific user, which directly matches the changeset that introduces a new Go solution file.
Description check	✅ Passed	The description is directly related to the changeset, clearly stating it contains a solution for Challenge 2 with specific file path and testing checklist information.

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

challenge-2/submissions/AlexO-85/solution-template.go (1)

9-21: Well-structured main function.

The logic correctly reads input, reverses it, and prints the result. Consider optionally checking scanner.Err() after Scan() returns false to distinguish read errors from EOF, though for a challenge submission this may not be critical.

If you want to add error handling:

 func main() {
 	// Read input from standard input
 	scanner := bufio.NewScanner(os.Stdin)
 	if scanner.Scan() {
 		input := scanner.Text()
 
 		// Call the ReverseString function
 		output := ReverseString(input)
 
 		// Print the result
 		fmt.Println(output)
 	}
+	if err := scanner.Err(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error reading input: %v\n", err)
+		os.Exit(1)
+	}
 }

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 231bd24 and 462e33c.

📒 Files selected for processing (1)

• challenge-2/submissions/AlexO-85/solution-template.go (1 hunks)

🔇 Additional comments (1)

challenge-2/submissions/AlexO-85/solution-template.go (1)

23-32: Excellent string reversal implementation.

The function correctly handles Unicode by converting to runes before reversing. The two-pointer swap algorithm is efficient (O(n) time, O(n) space) and handles all edge cases properly including empty strings, single characters, and multi-byte UTF-8 sequences.