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Oct 23, 2025
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Add solution for Challenge 2 by labib99 #619

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33 changes: 33 additions & 0 deletions challenge-2/submissions/labib99/solution-template.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
package main

import (
"bufio"
"fmt"
"os"
)

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)
}
}
Comment on lines +9 to +21
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@coderabbitai coderabbitai bot Oct 23, 2025

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⚠️ Potential issue | 🟡 Minor

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.

Suggested change
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.


// ReverseString returns the reversed string of s.
func ReverseString(s string) string {
// TODO: Implement the function
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@coderabbitai coderabbitai bot Oct 23, 2025

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⚠️ Potential issue | 🟡 Minor

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.

Suggested change
// 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.

runes := []rune(s)
tmpRunes := make([]rune, len(runes))
for idx, r := range runes {
reverseIdx := len(runes) - 1 - idx
tmpRunes[reverseIdx] = r
}
return string(tmpRunes)
}
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