How do you access certain parts of an array with type []interface{} in Go?

Question

I have a map with string keys and different types for values, when printing it looks like this:

map[command:ls count:[1 1]]

When checking reflect.TypeOf on the count it returns type []interface{} . I cannot access the values by index, and if I try passing it into a function that accept a param of type []interface{} it claims that I'm tying to pass a value of type interface{}

I would like to access the count in this example which would be 2 values. 1 and 1 .

Answer 1

You have to differentiate type and underlying type. Your map is of the type map[string]interface{} . Which means that the value for count is of type interface{} , and its underlying type if []interface{} . So you can't pass the count as a type []interface{} . You have do a type assertion it before using it as an array. Every item will then of type interface{} , which can in turn be asserted as int (as it seem your data is).

Example:

count := m["count"].([]interface{})
value1 := count[0].(int)
value2 := count[1].(int)