Flexible design to extend or remove kwarg in functions

[hendri54]

Some useful options are shown at

How to use `kwargs` to avoid passing around keyword arguments?

I found the documentation on kwargs to be a little terse… how can I exploit keyword arguments to avoid copying tons of different keyword arguments when passing them function to function? my example below. seems unnatural to write out so many keyword arguments and keep track of them in two places. or is this what needs done? note _viz_posterior_fit! will be called elsewhere. thx for tips/insights. will pass on to my students function _viz_posterior_fit!(ax::Axis, data::DataFrame,…

The suggestion to package large numbers of kwargs into a struct makes sense to me.
I also like the “merge defaults” pattern:

function foo(; kwargs...)
   # Note that `x = 17` works as well as `:x => 17`
   defaults = (x = 17, );
   args = merge(defaults, kwargs);
   println(args[:x])
   # Or call another function `bar(; args...)`
end