Alternative to mutable named tuple?

General Usage
9

As you’ve already found out, Setfield.jl has enough mechanisms to allow this but there is no high-level easy-to-use interface yet. FYI, BangBang wraps the low-level interface and lets you mutate (or widen) array of named tuples:

julia> using BangBang

julia> xs = [(a=1, b=2), (a=3, b=4)]
2-element Array{NamedTuple{(:a, :b),Tuple{Int64,Int64}},1}:
 (a = 1, b = 2)
 (a = 3, b = 4)

julia> @set!! xs[1].b = 200;

julia> xs
2-element Array{NamedTuple{(:a, :b),Tuple{Int64,Int64}},1}:
 (a = 1, b = 200)
 (a = 3, b = 4)

See: https://tkf.github.io/BangBang.jl/dev/#BangBang.SetfieldImpl.@set!!-Tuple{Any}

If this is the motivation, I think StructArrays.jl is the best choice as tbeason mentioned.

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