I see thank you very much for your answer! :D
El martes, 25 de octubre de 2016, 13:20:50 (UTC-5), Tim Holy escribió: > > > Why not use dispatch instead? > > Because subtyping isn't powerful enough for all needs. For example: > > > julia> using Unitful > > julia> const mm = u"mm" > mm > > julia> isa(3.2mm, AbstractFloat) > false > > > You'd probably like to use the fancy logic of `FloatRange` if you're > constructing a range `3.2mm:0.1mm:4.8mm`, so the solution is to dispatch on > a trait that indicates that arithmetic isn't exact (which is what really is > going on inside that code anyway---who cares what kind of number type it > is). > > Best, > --Tim > > On Tue, Oct 25, 2016 at 12:55 PM, Ismael Venegas Castelló < > ismael...@gmail.com <javascript:>> wrote: > >> Why not use dispatch instead? >> >> isexact(::Integer) = true >> isexact(::Rational) = true >> isexact(x::Complex) = isexact(x.re) >> isexact(::Any) = false > > >
