Initializing empty object in Go

Question

I will use exec.Command with different arguments depending on a variable. I do cmd := exec.Command(... in the if/else brackets , so cmd is unusable outside of that scope. Is it possible to initialize cmd above if/else so that it can be used afterward?

var cmd *exec.Cmd (golang.org/ref/spec#Variables and golang.org/ref/spec#Variable_declarations) — mkopriva
– mkopriva, Commented Nov 7, 2018 at 21:51

mkopriva · Accepted Answer · 2018-11-07 21:58:00Z

2

You can declare a typed variable before you have a value for it.

 var cmd *exec.Cmd
 // or
 cmd := (*exec.Cmd)(nil)

Read more here https://golang.org/ref/spec#Variables and here https://golang.org/ref/spec#Variable_declarations.

answered Nov 7, 2018 at 21:58

mkopriva

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