Default arguments -> another syntax?

Hello.

Lately I had an idea.

Methods take default arguments like so:

def foo(i = ‘blee’, j = ‘blabalaa’)

I had a need to call foo() in my code, but change the default
to the j argument. There may be several ways, like redefining:

def foo(i = ‘blee’, j = ‘foofoo’)

One could also use a hash instead.

But I myself, thought about this:

foo.j = ‘dumdedum’

Of course this does not work. But my question is, would this
work in Ruby in theory? And if not, why can it not work?

I am thinking that methods could be treated as pseudo objects.
We also can already create objects from methods via method(:name)
(I think it is of UnboundMethod class)

I am wondering, if arguments to methods are data, why couldn’t
they be (pseudo)objects at the same time as well?

Marc H. wrote in post #1002090:

I am wondering, if arguments to methods are data,

Besides being simple data they can be syntax trees. E.g., you can do:

def foo(i = ‘blee’, j = i.length)

and it will be evaluated anew each time you call the function (without
‘j’).

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs