Ternary operator

[joonas-fi]

Prototype:

// 'ternary operator'
func IfElseAssign[T any](val bool, ifTrue T, ifFalse T) T {
	if val {
		return ifTrue
	} else {
		return ifFalse
	}
}

// 'ternary operator' (lazy production of value)
func IfElseAssignFn[T any](val bool, ifTrue func() T, ifFalse func() T) T {
	if val {
		return ifTrue()
	} else {
		return ifFalse()
	}
}

// "adapter" for making values for `IfElseAssignFn` without having to type the full `func () string { return "foo" }`
func fn[T any](val T) func() T {
	return func() T { return val }
}

func main() {
	name := "Joonas"
	powerEstimate := IfElseAssignFn(name == "Joonas", fn(9001), fn(3))
	powerEstimate = IfElseAssign(name == "Joonas", 9001, 3)
	fmt.Printf("Power of %s = %d\n", name, powerEstimate)
}