You might want to look into the various introspection functions, like `methods`, `code_lowered`, etc. Leah Hanson had a nice blog post: http://blog.leahhanson.us/julia-introspects.html
For your specific problem, once you have a specific method, then `m.sig` returns its signature, and you can just compute the length. A MethodTable (returned by `methods(sum)`, for example) is iterable, so you can iterate over the table until you find what you want. Best, --Tim On Thursday, October 16, 2014 08:55:01 AM Evan Pu wrote: > How do I get the number of arguments of a function? > > for instance, f(x, y) = x + y > > I want something like num_args(f), which will give me back 2. If the > function has multiple methods then something more general would be nice, > but so far I only care about functions with just a single method. > > Is there something like this? > thanks alot!!
