In GO, how do I declare the returned variables of a function WITH TYPE ?
e.g. I have this code
dat, err := ioutil.ReadFile("/tmp/dat")
check(err)
fmt.Print(string(dat))
but what I want is this:
var dat []byte, err error := ioutil.ReadFile("/tmp/dat")
check(err)
fmt.Print(string(dat))
However, no matter how I try, I only get this output
syntax error: unexpected comma, expecting semicolon or newline or }
I'm working without IDE, and as the number of variables increases, it's really idiotic to have to keep all the return values's types in short-term memory... let alone if somebody else has to read the code.
How can I declare the returned tuple WITH type ?
That's because you're using := in your assignment there and that is a convenience syntax to declare and assign. It makes it so you don't have to provide the type, I assume the compiler just implies it by what is returned/whatever types come from the right hand side. Instead you need to do this;
var dat []byte
var err error
dat, err = ioutil.ReadFile("/tmp/dat")
But no one does this because dat, err := ioutil.ReadFile("/tmp/dat") is such a cleaner syntax.