Take a look at applicable().
On Saturday, March 28, 2015 at 4:30:09 PM UTC-4, Sheehan Olver wrote: > > It currently works like this, which does work with f(x)=x, f(x,y) = x+y: > > try > f(0) > catch > try > f(0,0) > catch > f((0,0)) > end > end > > This code is meant for REPL usage primarily, and so the convenience of > typing just Fun(f) is worth having such “questionable” code. > > > > On 29 Mar 2015, at 6:29 am, Mauro <[email protected] <javascript:>> > wrote: > > > >> In ApproxFun, a user supplied function is approximated. the > >> approximation depends on whether the function is univariate or > >> bivariate > > > > How does it work, if the user defines several methods? > > > > f(x) = x > > f(x,y) = x+y > > > >>> The method_exists function would probably be a slightly cleaner way > >>> to do this. > > > > method_exists should be good for generic functions but it does not work > > with anonymous functions. I think this gives you the number of > > arguments: > > > > length(Base.uncompressed_ast(( (x,y,z)->1 ).code.def).args[1]) > > > > something similar should let you figure out whether a one-argument > > signature is a tuple. Not sure though this is the preferred approach. > >
