How to access elements from slice using index which is passed by reference in golang
go, pass-by-reference, slice
Solution
The index operator doesn't automatically dereference pointers. You need to use parentheses to specify what is dereferenced.
m := (*s)[0]
Problem
I passed a reference of a slice to a function and I am making changes in the slice inside the function. Also I am trying to access an element from the slice using index. It is throwing exception in golang. What is the best way to access an element from a slice by index which is passed by reference? You can find a sample code here. [ref : http://www.reddit.com/r/golang/comments/283vpk/help_with_slices_and_passbyreference/ ]. Since my code is huge I added a sample. ``` package main import "fmt" type mystruct struct { val int } func main() { var s1 []mystruct var s2 []mystruct onlyPassing(&s1) s2 = returningToo(s2) fmt.Printf("%#v\n%#v", s1, s2) } func onlyPassing(s *[]mystruct) { *s = append(*s, mystruct{1}) m := *s[0] } func returningToo(s []mystruct) []mystruct { s = append(s, mystruct{1}) return s } ``` And you can find the implementation here. Could anyone help me on this.