Analyse des erreurs Golang : problèmes courants et solutions

package main

import (
    "errors"
    "fmt"
)

func divide(a, b int) (int, error) {
    if b == 0 {
        return 0, errors.New("division by zero")
    }
    return a / b, nil
}

func main() {
    result, err := divide(10, 0)
    if err != nil {
        fmt.Println("Error:", err)
    } else {
        fmt.Println("Result:", result)
    }
}

package main

import "fmt"

func thirdFunc() {
    fmt.Println("Inside third function")
    panic("Oops, something went wrong")
}

func secondFunc() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from:", r)
        }
    }()

    fmt.Println("Inside second function")
    thirdFunc()
}

func firstFunc() {
    fmt.Println("Inside first function")
    secondFunc()
}

func main() {
    firstFunc()
}

package main

import (
    "fmt"
    "github.com/pkg/errors"
)

func getUser(id int) (string, error) {
    if id <= 0 {
        return "", errors.New("invalid user id")
    }
    return "User", nil
}

func main() {
    id := -1
    user, err := getUser(id)
    if err != nil {
        err = errors.Wrap(err, "failed to get user")
        fmt.Printf("Error: %v
", errors.Cause(err))
    } else {
        fmt.Println("User:", user)
    }
}