Add solution for Challenge 2 by labib99 #619
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WalkthroughIntroduces a new solution submission file for Challenge 2 containing a main function that reads input from stdin and a ReverseString function that reverses strings by converting to runes and reconstructing them in reverse order. Changes
Estimated code review effort🎯 1 (Trivial) | ⏱️ ~2 minutes Possibly related PRs
Pre-merge checks❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
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Actionable comments posted: 2
🧹 Nitpick comments (1)
challenge-2/submissions/labib99/solution-template.go (1)
24-33: String reversal logic is correct.The implementation correctly handles Unicode characters by converting to runes and reversing them. The logic is sound and will work for all valid inputs including empty strings and multi-byte Unicode characters.
For a minor performance improvement, you could use a two-pointer swap approach that modifies the slice in-place instead of allocating a new slice:
func ReverseString(s string) string { runes := []rune(s) for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 { runes[i], runes[j] = runes[j], runes[i] } return string(runes) }However, your current implementation is perfectly valid for this challenge.
| func main() { | ||
| // Read input from standard input | ||
| scanner := bufio.NewScanner(os.Stdin) | ||
| if scanner.Scan() { | ||
| input := scanner.Text() | ||
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| // Call the ReverseString function | ||
| output := ReverseString(input) | ||
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| // Print the result | ||
| fmt.Println(output) | ||
| } | ||
| } |
There was a problem hiding this comment.
Add error handling for scanner.
The scanner might encounter errors during input reading that should be checked. After the if scanner.Scan() block, you should verify scanner.Err() to ensure no I/O errors occurred.
Apply this diff 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)
+ }
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| 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) | |
| } | |
| } | |
| 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) | |
| } | |
| } |
🤖 Prompt for AI Agents
In challenge-2/submissions/labib99/solution-template.go around lines 9 to 21,
the scanner error is not checked after using scanner.Scan(); add handling by
calling scanner.Err() after the Scan block and, if non-nil, write the error to
stderr (or log it) and exit with a non-zero status so I/O errors are surfaced
and the program does not silently continue.
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| // ReverseString returns the reversed string of s. | ||
| func ReverseString(s string) string { | ||
| // TODO: Implement the function |
There was a problem hiding this comment.
Remove the TODO comment.
The function is already implemented, so the TODO comment on line 25 should be removed.
Apply this diff:
// ReverseString returns the reversed string of s.
func ReverseString(s string) string {
- // TODO: Implement the function
runes := []rune(s)📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| // TODO: Implement the function | |
| // ReverseString returns the reversed string of s. | |
| func ReverseString(s string) string { | |
| runes := []rune(s) |
🤖 Prompt for AI Agents
In challenge-2/submissions/labib99/solution-template.go around line 25, remove
the leftover TODO comment "// TODO: Implement the function" because the function
is already implemented; edit the file to delete that comment so only the
implemented code remains and save the file.
2 participants
Challenge 2 Solution
Submitted by: @labib99
Challenge: Challenge 2
Description
This PR contains my solution for Challenge 2.
Changes
challenge-2/submissions/labib99/solution-template.goTesting
Thank you for reviewing my submission! 🚀