CODEWITHSUNDEEP
javascriptstringgo
Ivan
Ivan

Reputation: 1851

Is there an equivalent of this JS expression in Go?

Let's say we have 2 strings, str1 and str2. I want a new variable str3 to equal str1, or if str1 is empty then equal str2.

In JS I would write:

var str3 = str1 || str2

While in Go I have to do it like:

str3 := str1
if str1 == "" {
    str3 = str2
}

which is a little bit too verbose imo. Is there an equivalent expression as the one in JS?

Upvotes: 1

Views: 664

Answers (2)

Andy Schweig
Andy Schweig

Reputation: 6749

There is no equivalent operation in Go. You have to do it with an if (or a switch, but that's even more verbose). I would write it like this:

var str3 string
if str1 != "" {
    str3 = str1
} else {
    str3 = str2
}

Upvotes: 0

user142162
user142162

Reputation:

Is there an equivalent expression as the one in JS?

No, but if you find yourself doing this often, you could write a function that does what you're trying to accomplish:

func strs(s ...string) string {
    if len(s) == 0 {
        return ""
    }
    for _, str := range s[:len(s)-1] {
        if str != "" {
            return str
        }
    }
    return s[len(s)-1]
}

Usage:

str3 := strs(str1, str2)

https://play.golang.org/p/Gl_06XDjW4

Upvotes: 2

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