Rails - Aug 2005 - [Ruby] get a reference to a function or method, not call it with no arguments

A very simple ruby question:

irb(main):004:0> test_for_blockdev = FileTest.blockdev?
ArgumentError: wrong number of arguments (0 for 1)
	from (irb):4:in `blockdev?''
	from (irb):4
irb(main):005:0> 

I don''t want to call the damn thing, I just want a reference to it! Or
has too much javascript clouded my brain to the way of ruby?

Tom Sw



		
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On Fri, 2005-08-12 at 16:43 +0100, Tom Schutzer-Weissmann
wrote:
> irb(main):004:0> test_for_blockdev = FileTest.blockdev?
> ArgumentError: wrong number of arguments (0 for 1)
> 	from (irb):4:in `blockdev?''
> 	from (irb):4
> irb(main):005:0> 
> 
> I don''t want to call the damn thing, I just want a reference to
it! Or
> has too much javascript clouded my brain to the way of ruby?
This might be wrong but....

  test_for_blockdev = lambda { |a| FileTest.blockdev? a }

that should make test_for_blockdev a Proc object, so you can:

  test_for_blockdev.call(arg)

Not quite a "reference", but I''m not sure how you would do
that.  Maybe
a guru can set up both straight....

-Matt B

How about

test_for_blockdev = FileTest.method(:blockdev?)

/Marcus