Overload broadcasting for custom struct?

[LaurentPlagne]

Glad that is useful !
For your second question see the discussion here

Why do we need to define separate methods for commutative binary operators?

Eg: julia> struct abc x :: Int end julia> Base.:(+)(a::abc, b::Int) = abc(a.x + b) julia> abc(1) + 1 abc(2) julia> 1 + abc(1) ERROR: MethodError: no method matching +(::Int64, ::abc) julia> Base.:(==)(a::abc, b::Int) = a.x == b julia> abc(1) == 1 true julia> 1 == abc(1) false Shouldn’t the second method in each case automatically be defined in terms of the first? This breaks commutativity in case of the equality. A missing method would have been better than this instead of …