What is the preferred map pattern-matching style in a function parameter?

[kokolegorille]

Hello and welcome,

You might find an answer here…

What does %User{} = user means?

A = inside a pattern which is what you are have in your function head just measn that both sides must match. So writing %User{} = user in a pattern means that both the struct %User and the variable user must match. This means that writing user = %User{} in a pattern has the same meaning, both sides must match. However, and this is a big however, using = in the body of a function has a different meaning. It is a match operator, pattern = expression which first evaluates the expression in RHS and…

I always use the form %{} = person, but You can use both