Performant Recursive Anonymous Functions

General Usage
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8

Local scope is such a weird place to be :sweat_smile:

We can define named functions with type-specialized methods,

julia> f = let
           function f(x::Int) x^2 end
           function f(x::Float64) x/2 end
       end
f (generic function with 2 methods)

julia> f(2)
4

julia> f(2.0)
1.0

and then throw them all away

julia> f = let
           function f(x::Int) x^2 end
           function f(x::Float64) x/2 end
           f = 0
       end
0

julia> f
0

It’s so bizarre :sweat_smile: it feels like this ought to throw an error, the way it would at global scope.