如何获得真实布尔值的“和”

Question

In this scenario I have 3x boolean vars (already set to either true or false)

The goal here is to identify if more than one of the set of bool vars are set to true

Right now I have the following written, which does work:

    boolval := 0
    if *firstbool {
        boolval++
    }
    if *secondbool {
        boolval++
    }
    if *thirdbool {
        boolval++
    }
    if boolval > 1 {
        // More than 1 of the bool vars are true
    }

I always flag my logic if I am writing successive if{} statements, so I figured I would ask you geniuses how you would accomplish this.

Answer 1

identify if more than one of the set of bool vars are set to true

---

For example, write a set function:

package main

import "fmt"

func nTrue(b ...bool) int {
    n := 0
    for _, v := range b {
        if v {
            n++
        }
    }
    return n
}

func main() {
    v1, v2, v3 := true, false, true

    fmt.Println(nTrue(v1, v2, v3))

    if nTrue(v1, v2, v3) > 1 {
        // . .   .
    }
    // Or
    if n := nTrue(v1, v2, v3); n > 1 {
        // . .   .
    }
    // Or
    n := nTrue(v1, v2, v3)
    if n > 1 {
        // . .   .
    }
}

Playground: https://play.golang.org/p/g3WCN6BgGly

Output:

2

---

For example, range over the set,

package main

import "fmt"

func main() {
    v1, v2, v3 := true, false, true

    boolval := 0
    for _, v := range []bool{v1, v2, v3} {
        if v {
            boolval++
        }
    }
    if boolval > 1 {
        // . .   .
    }

    fmt.Println(boolval > 1, boolval)
}

Playground: https://play.golang.org/p/R6UGb8YYEFw

Output:

true 2