Function with a single method acting on Union{T1, T2} or another function with two methods, for T1 and T2?

[hendri54]

This is similar to

Method dispatch

Julia is a lot about multiple dispatching and I am having trouble to understand what an idiomatic way of using mulitple dispatch is. My question is for small methods if I should define two different methods or if I should just use if else statements? (i.e. if typeof(...)...) Example: I want to format/convert numbers or arrays of numbers into a string. Is the below approach reasonable? Or what is an idiomatic way to deal with the two cases (i) a single number and (ii) an array of things (e.g. n…

Generically, the area2 approach has two benefits:

• it can be expanded to additional shapes
• it guarantees compile time dispatch (if the rest of the code is type stable)
  Perhaps the logical approach would be to set up Square and Rectangle as subtypes of Quadrilateral. But that depends on what else you are doing with those types.