Get single result from multiple-context function call without intermediary variable

Question

In Go I can use the underscore to ignore a return value from a function that returns multiple values. For instance:

res, _ := strconv.Atoi("64")

Suppose I wanted to use the first value directly into another function call (while ignoring error checking best practices, in this example):

myArray := make([]int, strconv.Atoi("64"))

The compiler will complain that I'm using a multiple-value function in a singe-value context:

./array-test.go:11: multiple-value strconv.Atoi() in single-value context

Is it possible to "pick and choose" from the return values in a single-line without resorting to auxiliary functions?

score 1 · Answer 1 · answered May 02 '16 at 21:50

The only real way to do it is to create some utility "bypass" function, and since this is Go, you'll have to declare one per type.

for example:

func noerrInt(i int, e err) int {
   return i
}

then you can do:

myArray := make([]int, noerrInt(strconv.Atoi("64")))

But really, this pretty much sucks, AND ignores best practices.

1 Answers1