Call a function: Difference between revisions

::However, it is reasonably common to see a structure used for this. In this example <code>gif.Options</code> is a structure with multiple members which can initialized/assigned by name or omitted (or the whole third argument can just be <code>nil</code>). <lang go> gif.Encode(ioutil.Discard, image.Black, &gif.Options{NumColors: 16})</lang>

* Optional arguments are supported.

 

import "fmt"

func main() {

fmt.Println(doIt(Params{a: 1, c: 9})) // prt 10

* Named arguments are supported.

 

import "fmt"

args["c"] = 1

bar(args["a"], args["b"], args["c"]) // prt 3, 2, 1

* Within a statement context.

::Assignment statements are shown later. Only functions returning a single value can be used in a single value context: <lang go> if 2*g(1, 3.0)+4 > 0 {}</lang>