Set struct's parameters using a function whose first argument is for the struct

[tkf]

@lmiq

I was just playing a little bit with that problem, and this is a general solution, for any number of parameters.

For a generic solution for changing immutables (and also mutables), I highly recommend Setfield.jl. It is useful, especially for nested immutables. You don’t need to understand anything complex for just using it, but if you want to know the idea behind Setfield.jl, this JuliaCon talk is a great introduction:

JuliaCon 2020 | Changing the immutable | Jan Weidner