Uh, this isn't dynamic dispatch (aka associating a function callsite to its implementation at runtime): https://en.m.wikipedia.org/wiki/Dynamic_dispatch https:

Uh, this isn't dynamic dispatch (aka associating a function callsite to its implementation at runtime): https://en.m.wikipedia.org/wiki/Dynamic_dispatch https://en.m.wikipedia.org/wiki/Dynamic_dispatch It's just pattern matching and lamdbas. In another language you'd probably do the same thing with a map containing commands as keys and lambdas as values.