Code completion for Ruby - Net Beans, RDT, and more


#1

Code completion for Ruby is on its way. I’m concerned that the
recently popular style of using hashes to fake named params will keep
us in the dark, though.

And anyway, Ruby wants to get named params. How about this: declare
the method explicitly:

def parse(filename, char = nil, conn = nil, another_param = nil)

and have the interpreter allow the style, by converting a final hash
to params if and only if all of the keys match the arg names.

So:

parse(‘readme.txt’, :char => ‘a’, :another_param => true)
becomes
parse(‘readme.txt’, a, nil, true)

whereas
parse(‘readme.txt’, :bad_param => ‘b’)
would still be
parse(‘readme.txt’, {:bad_param => ‘b’})
and it would be up to the parse method to handle as it normally does.

This would allow:

  • real named params
  • more explicit method definitions
  • code completion
  • preserve the current style

#2

Right - I should clarify - my goal is to allow easy migration of all
of the current libs that use option hashes.

With the syntax I’m suggesting, library owners could change their
method definitions, and not break older code.


#3

On 3/22/07, S. Robert J. removed_email_address@domain.invalid wrote:

to params if and only if all of the keys match the arg names.
parse(‘readme.txt’, {:bad_param => ‘b’})
and it would be up to the parse method to handle as it normally does.

This would allow:

  • real named params
  • more explicit method definitions
  • code completion
  • preserve the current style

Named parameters is in the ToDo file on 1.9 distribution:

  • named arguments like foo(nation:=“german”) or foo(nation: “german”).

so you may get what you want
pth