# How to make a struct support subsetting elements 'recursively'
**URL:** https://discourse.julialang.org/t/how-to-make-a-struct-support-subsetting-elements-recursively/43344
**Category:** New to Julia
**Tags:** question
**Created:** [July 19, 2020, 6:56pm UTC](https://discourse.julialang.org/t/how-to-make-a-struct-support-subsetting-elements-recursively/43344 "2020-07-19T18:56:42Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mkarikom](https://discourse.julialang.org/u/mkarikom)
#### Post date: [July 19, 2020, 6:56pm UTC](https://discourse.julialang.org/t/how-to-make-a-struct-support-subsetting-elements-recursively/43344/1 "2020-07-19T18:56:42Z")
Suppose I have the following:
```julia
struct mystuff
x::Array{Float64,1}
y::Array{Float64,1}
mystuff(n) = begin
s = new(Array{Float64,1}(undef,n),Array{Float64,1}(undef,n))
return s
end
mystuff(x,y) = begin
s = new(x,y)
return s
end
end
check = mystuff([1,2,3],[8,9,10])
```
How do I make this support subsetting like `check2=check[]` so that the following happens:
```julia
julia> check2=check[1:2]
julia> check2.x
2-element Array{Float64,1}:
1.0
2.0
julia> check2.y
2-element Array{Float64,1}:
9.0
10.0
```
---
### Author:  [@a5vzener](https://discourse.julialang.org/u/a5vzener)
#### Post date: [July 19, 2020, 7:48pm UTC](https://discourse.julialang.org/t/how-to-make-a-struct-support-subsetting-elements-recursively/43344/2 "2020-07-19T19:48:44Z")
As one solution, you could override Base.getindex:
> julia\> import Base: getindex
>
> julia\> getindex(s::mystuff, i) = mystuff(s.x[i], s.y[i])
> getindex (generic function with 545 methods)
>
> julia\> check = mystuff([1,2,3],[8,9,10])
> mystuff([1.0, 2.0, 3.0], [8.0, 9.0, 10.0])
>
> julia\> check[1:2]
> mystuff([1.0, 2.0], [8.0, 9.0])
This is a typical Julia pattern. Use the type system to create specific behavior and override Base or other functions (i.e. add new methods of those functions) locally to support your types.
---
### Author:  [@mkarikom](https://discourse.julialang.org/u/mkarikom)
#### Post date: [July 19, 2020, 8:04pm UTC](https://discourse.julialang.org/t/how-to-make-a-struct-support-subsetting-elements-recursively/43344/3 "2020-07-19T20:04:30Z")
perfect, thanks