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Add solution for Challenge 2 by eksly #622

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merged 1 commit into from
Oct 26, 2025
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Add solution for Challenge 2 by eksly #622

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33 changes: 33 additions & 0 deletions challenge-2/submissions/eksly/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 24, 2025

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⚠️ Potential issue | 🟡 Minor

Add error handling for scanner.

After scanning input, you should check for errors using scanner.Err(). Currently, if an I/O error occurs during scanning, it will be silently ignored.

Consider this improvement:

 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/eksly/solution-template.go around lines 9 to 21, the
code ignores potential scanning errors — after using scanner.Scan() you must
call scanner.Err() to detect I/O errors; modify the main function to check
scanner.Err() after scanning and handle any non-nil error (e.g., print an error
to stderr and os.Exit(1) or return) so I/O failures are not silently ignored.


// ReverseString returns the reversed string of s.
func ReverseString(s string) string {
var res []rune
runes := []rune(s)

for i := len(runes) -1; i >= 0; i-- {
res = append(res, runes[i])
}

return string(res)
}
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