Created go file With ADV errors

[mayanksingh0307]

No description provided.

[mayanksingh0307]

Sure! Here's a Go code snippet with at least 10 major issues spanning compilation, security, performance, and maintainability:
package main

import (
"fmt"
"math/rand"
"os"
"time"
)

func main() {
// 1. Compilation error: Missing import for "io/ioutil"
data, err := ioutil.ReadFile("nonexistentfile.txt")
if err != nil {
fmt.Println("Error reading file:", err)
}

// 2. Compilation error: Undefined variable
result := a + 5

// 3. Compilation error: Mismatched types
var x int = "string"

// 4. Security issue: Hardcoded credentials
username := "admin"
password := "password123"

// 5. Performance issue: Inefficient string concatenation
longString := ""
for i := 0; i < 10000; i++ {
	longString += "a"
}

// 6. Performance issue: Creating Random object in loop
for i := 0; i < 10000; i++ {
	rand.Seed(time.Now().UnixNano())
	num := rand.Intn(100)
	fmt.Println(num)
}

// 7. Maintainability issue: Magic numbers
if result > 42 {
	fmt.Println("Result is greater than the magic number.")
}

// 8. Performance issue: Inefficient file reading
file, err := os.Open("largefile.txt")
if err != nil {
	fmt.Println("Error opening file:", err)
}
defer file.Close()

buf := make([]byte, 1)
for {
	_, err := file.Read(buf)
	if err != nil {
		break
	}
	fmt.Print(string(buf))
}

// 9. Maintainability issue: Deeply nested loops
for i := 0; i < 10; i++ {
	for j := 0; j < 10; j++ {
		for k := 0; k < 10; k++ {
			fmt.Println("Nested loop level 3")
		}
	}
}

// 10. Security issue: Insecure random number generation
insecureRandom := rand.Float64() * 100
fmt.Println("Insecure random number:", insecureRandom)

}
Here are the issues in this code:

1. Compilation Error: Missing import for "io/ioutil".
2. Compilation Error: Undefined variable a in result := a + 5 .
3. Compilation Error: Mismatched types ( var x int = "string" ).
4. Security Issue: Hardcoded credentials ( username and password ).
5. Performance Issue: Inefficient string concatenation using += in a loop.
6. Performance Issue: Creating a new Random object inside a loop.
7. Maintainability Issue: Use of magic numbers ( 42 ).
8. Performance Issue: Inefficient file reading (reading one byte at a time).
9. Maintainability Issue: Deeply nested loops.
10. Security Issue: Insecure random number generation using rand.Float64() .

To fix these issues, you would need to:

1. Add the import statement for "io/ioutil".
2. Define the variable a before using it.
3. Correct the type mismatch.
4. Avoid hardcoding credentials; use secure storage mechanisms.
5. Use a strings.Builder for string concatenation.
6. Create a single rand.Rand object and reuse it.
7. Replace magic numbers with named constants.
8. Use a buffered reader for file reading.
9. Refactor deeply nested loops to improve readability.
10. Use crypto/rand for secure random number generation.