mouredev#10 - GO

Author: Amador Quispe

Roadmap/10 - EXCEPCIONES/go/AmadorQuispe.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+)
+
+//De manera general, GO representa cualquier tipo de error mediante la interfaz error:
+
+func main() {
+	//División por cero
+	if res, err := divideTwoNumbers(10, 0); err == nil {
+		fmt.Println(res)
+	} else {
+		fmt.Println(err)
+	}
+
+	//Indice fuera de rango
+	numbers := []int{1, 2, 3, 4, 5, 6}
+	val, err := getElementByIndex(numbers, 6)
+	if err != nil {
+		fmt.Println(err)
+	} else {
+		fmt.Println(val)
+
+	}
+
+	//Error personalizado
+	result, err := divisionPositive(-34, 3)
+	if err != nil {
+		fmt.Println(err)
+	} else {
+		fmt.Println(result)
+	}
+}
+
+func divideTwoNumbers(a, b int) (int, error) {
+	if b == 0 {
+		return 0, errors.New("cannot divide by zero")
+	}
+	return a / b, nil
+}
+
+func getElementByIndex[T any](slice []T, i int) (T, error) {
+	if len(slice) >= i {
+		var zeroValue T
+		return zeroValue, errors.New("index of range! it must be less than " + strconv.Itoa(i))
+	}
+	return slice[i], nil
+}
+
+type CustomError struct {
+	msg string
+}
+
+func (ce *CustomError) Error() string {
+	return ce.msg
+}
+
+func divisionPositive(numerator, denominator int) (int, error) {
+	if numerator < 0 || denominator < 0 {
+		return 0, &CustomError{msg: "not valid numbers negatives"}
+	}
+	return numerator / denominator, nil
+}