Which functions have methods defined only for scalars, vectors, or 2d-arrays?

methodsbyrank.jl

el = Float64
types=(el, Vector{el}, Matrix{el})
functions=Dict()
for mytype in types
    functions[mytype]={}
    for method in methodswith(mytype, true)
        (length(method.sig) == 1) || #Unary functions
	  (length(method.sig) == 2 && method.va) || #Binary function with varargs
	  continue
        method.func.code.name in functions[mytype] && continue #Don't duplicate
        push!(functions[mytype], method.func.code.name)
    end
end

#This should be a list of all currently defined functions in the current namespace
allfunctions = unique([values(functions)...]) 

#Construct power sets of types
for powersetpattern in 0:2^(length(types))-1
    for f in allfunctions
        for (j, mytype) in enumerate(types)
            hastype = bool((powersetpattern >> (j-1)) & 1)
            f in functions[mytype] == hastype || @goto skip
        end

        for mytype in types
            print(f in functions[mytype] ? "Y " : "- ")
        end
        println(string(f))
        @label skip
    end
end