# Broadcast over . (getfield) in 0.6
**URL:** https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335
**Category:** General Usage
**Tags:** question, broadcast
**Created:** [February 27, 2017, 10:17am UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335 "2017-02-27T10:17:10Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [February 27, 2017, 10:17am UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335/1 "2017-02-27T10:17:10Z")
In `0.6` I can do
```julia
immutable MyType
a
b
end
pairs = [MyType(i,2*i) for i in 1:10]
getfield.(pairs, :a)
```
but I can’t figure out the broadcast syntax for `.`, ie how to deal with two dots:
```julia
pairs..a # where to put ()'s? or is this impossible?
```
---
### Author:  [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)
#### Post date: [February 27, 2017, 11:30am UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335/2 "2017-02-27T11:30:45Z")
what about using comprehension? `[p.a for p in pairs]`. `pairs..a` is a little bit of ambiguous. `pairs` is not a function here, `(x->x.a).(pairs)` is more understandable.
---
### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [February 27, 2017, 12:24pm UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335/3 "2017-02-27T12:24:41Z")
Thanks, but I am interested in broadcasting, ie the syntax that would expand as
```julia
getfield.(pairs, :a)
```
---
### Author:  [@PabloZubieta](https://discourse.julialang.org/u/PabloZubieta)
#### Post date: [February 27, 2017, 2:57pm UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335/4 "2017-02-27T14:57:57Z")
For broadcasting, you need one of two forms, for functions `f` in general you do `f.(args...)` or use [dot operators](http://docs.julialang.org/en/latest/manual/mathematical-operations.html#man-dot-operators-1), e.g. `a .+ b`. The problem here is that `.` (dot) by itself is not an operator, so there can’t be a dot operator version for it.
If you want a compact form you could still define your own operator, though. E.g.
```julia
↦(s, f) = getfield(s, f)
pairs .↦ :a
pairs .↦ 1
```
---
### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [May 22, 2017, 2:05pm UTC](https://discourse.julialang.org/t/broadcast-over-getfield-in-0-6/2335/5 "2017-05-22T14:05:50Z")
Is there a way to somehow fold the constant?
```julia
using BenchmarkTools
↦(s, f) = getfield(s, f)
struct Foo{T}
a::T
end
two = (Foo(1),Foo(2))
const Both{T} = Tuple{T,T}
function f1(x::Both)
x.↦:a
end
function f2(x)
map(x->x.a, x)
end
```
then
```julia
julia> VERSION
v"0.6.0-rc1.0"
julia> @benchmark f1($two)
BenchmarkTools.Trial:
memory estimate: 32 bytes
allocs estimate: 2
--------------
minimum time: 35.476 ns (0.00% GC)
median time: 35.939 ns (0.00% GC)
mean time: 38.124 ns (1.99% GC)
maximum time: 754.734 ns (88.53% GC)
--------------
samples: 10000
evals/sample: 990
julia> @benchmark f2($two)
BenchmarkTools.Trial:
memory estimate: 0 bytes
allocs estimate: 0
--------------
minimum time: 1.695 ns (0.00% GC)
median time: 1.971 ns (0.00% GC)
mean time: 1.969 ns (0.00% GC)
maximum time: 16.157 ns (0.00% GC)
--------------
samples: 10000
evals/sample: 1000
```
@andyferris commented on [16285](https://github.com/JuliaLang/julia/issues/16285#issuecomment-253656462) mentioning this, but I did not see any follow-up.