multiple-return-values

I have a Go function which returns two integer values. Below is the function func temp() (int, int){ return 1,1 } Is it possible to put temp function directly into a Println and print both the outputs using string formatting as below: fmt.Println("first= %d and second = %d", temp() ) // This doesn't work In Python, I am able to do the following: def func(): return 1,1 print("{0}={1}".format(*func()) >> '1=2' Can I do Something similar in Go too? First, for what you attempt to do you should use fmt.Printf() instead of fmt.Println() as only the former expects and uses a format string. Going

I'm trying to write a function that maps an enumeration of values to a set of types based on the runtime value of the enumeration. I realize that you cannot return different types based on the runtime value of an enumeration because the compiler wouldn't know how much stack space to allocate. However I'm trying to write this as a constexpr function, using the new if-constexpr functionality to implement this. I'm getting an error from clang complaining that I'm using an illegally specified template parameter. Does anyone see how to implement this? edit: Here is an easier to grok version

In python, you can have a function return multiple values. Here's a contrived example: def divide(x, y): quotient = x/y remainder = x % y return quotient, remainder (q, r) = divide(22, 7) This seems very useful, but it looks like it can also be abused ("Well..function X already computes what we need as an intermediate value. Let's have X return that value also"). When should you draw the line and define a different method? jfs Absolutely (for the example you provided). Tuples are first class citizens in Python There is a builtin function divmod() that does exactly that. q, r = divmod(x, y) # (

In Go, the following works (note one use of the map has one return, the other has two returns) package main import "fmt" var someMap = map[string]string { "some key": "hello" } func main() { if value, ok := someMap["some key"]; ok { fmt.Println(value) } value := someMap["some key"] fmt.Println(value) } However, I have no idea how to do this same thing with my own function. Is it possible to have similar behavior with an optional return like map ? For example: package main import "fmt" func Hello() (string, bool) { return "hello", true } func main() { if value, ok := Hello(); ok { fmt.Println