[rcoder]

While I appreciate the convenience of this, I think you may be misunderstanding how Julia does method dispatch. Rather than dispatching purely on the type of their first argument (as in Python) or into a class hierarchy/namespace based on that argument, then by parameter types (ala Java) Julia methods are fully qualified over every parameter type.

Sadly, that makes it hard to ask the question "what methods can I call on an object of this type?" because the answer might include functions with that type in any parameter position. In many cases that wouldn't be a meaningful answer - as in the case of, say, a numeric type which could be used for all kinds of indexing, iteration, and offset methods involving collections, IO handles, etc.

You might benefit a bit more from using the 'apropos' builtin to lookup functions based on simple keyword matching. Given a type name it lists methods that take or emit objects of that type (which may or may not be exactly what you want, but it's a starting point at least).