Export fieldarrays (#50)

Author: Pietro Vertechi

README.md

@@ -28,6 +28,9 @@ julia> s.re
 2×2 Array{Float64,2}:
  0.680079  0.92407
  0.874437  0.929336
+
+julia> fieldarrays(s) # obtain all field arrays as a named tuple
+(re = [0.680079 0.92407; 0.874437 0.929336], im = [0.625239 0.267358; 0.737254 0.804478])
 ```
 
 Note that the same approach can be used directly from an `Array` of complex numbers:

src/StructArrays.jl

@@ -2,7 +2,7 @@ module StructArrays
 
 import Requires
 export StructArray, StructVector
-export collect_structarray
+export collect_structarray, fieldarrays
 
 include("interface.jl")
 include("structarray.jl")

src/structarray.jl

@@ -85,6 +85,21 @@ function Base.similar(s::StructArray{T}, sz::Tuple) where {T}
     StructArray{T}(map(typ -> similar(typ, sz), fieldarrays(s)))
 end
 
+"""
+`fieldarrays(s::StructArray)`
+
+Return the field arrays corresponding to the various entry of the struct as a named tuple.
+If the struct has no names (e.g. a tuple) automatic names are assigned (`:x1, :x2, ...`).
+
+## Examples
+
+```julia
+julia> s = StructArray(rand(ComplexF64, 4));
+
+julia> fieldarrays(s)
+(re = [0.396526, 0.486036, 0.459595, 0.0323561], im = [0.147702, 0.81043, 0.00993469, 0.487091])
+```
+"""
 fieldarrays(s::StructArray) = getfield(s, :fieldarrays)
 
 Base.getproperty(s::StructArray, key::Symbol) = getfield(fieldarrays(s), key)