英文:
Multiple assignment by if statement
问题
可以通过if条件执行多个赋值吗？就像下面的代码一样？
func SendEmail(url, email string) (string, error) {genUri := buildUri()if err := setRedisIdentity(genUri, email); err != nil; genUrl, err := buildActivateUrl(url, genUri); {return "", err}return "test", nil}
是的，可以在if条件中执行多个赋值操作。在你提供的代码中，if语句中的第一个赋值是err := setRedisIdentity(genUri, email)，第二个赋值是genUrl, err := buildActivateUrl(url, genUri)。这两个赋值操作都会在if条件判断为真时执行。
英文:
It is possible to execute multiple assignment by if condition, like the following code?
func SendEmail(url, email string) (string, error) {genUri := buildUri()if err := setRedisIdentity(genUri, email); err != nil; genUrl, err := buildActivateUrl(url, genUri); {return "", err}return "test", nil}
答案1
得分: 25
看起来你想要这样的代码：
package mainimport "fmt"func a(int) int { return 7 }func b(int) int { return 42 }func main() {if x, y := a(1), b(2); x > 0 && x < y {fmt.Println("sometimes")}fmt.Println("always")}
输出结果：
sometimesalways
英文:
It looks like you want something like this:
package mainimport "fmt"func a(int) int { return 7 }func b(int) int { return 42 }func main() {if x, y := a(1), b(2); x > 0 && x < y {fmt.Println("sometimes")}fmt.Println("always")}
Output:
sometimesalways
答案2
得分: 13
不。if语句的开始只允许有一个“简单语句”，根据规范。
推荐的方法是多个可能返回错误的测试，所以我认为你想要的是这样的：
func SendEmail(url, email string) (string, error) {genUri := buildUri()if err := setRedisIdentity(genUri, email); err != nil {return "", err}if genUrl, err := buildActivateUrl(url, genUri); err != nil {return "", err}return "test", nil}
英文:
No. Only one 'simple statement' is permitted at the beginning of an if-statement, per the spec.
The recommended approach is multiple tests which might return an error, so I think you want something like:
func SendEmail(url, email string) (string, error) {genUri := buildUri()if err := setRedisIdentity(genUri, email); err != nil {return "", err}if genUrl, err := buildActivateUrl(url, genUri); err != nil {return "", err}return "test", nil}
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