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comp.lang.ruby

Re: catch all method... e.g perl's autoload

Eric Hodel

9/2/2006 5:16:00 PM

On Sep 2, 2006, at 10:02 AM, Tim McIntyre wrote:
> Does ruby have a catchall method similar to perl's autoload?

Does this sound right?

$ ri Kernel#method_missing
-------------------------------------------------- Kernel#method_missing
obj.method_missing(symbol [, *args] ) => result
------------------------------------------------------------------------
Invoked by Ruby when obj is sent a message it cannot handle.
symbol is the symbol for the method called, and args are any
arguments that were passed to it. By default, the interpreter
raises an error when this method is called. However, it is
possible to override the method to provide more dynamic behavior.
The example below creates a class Roman, which responds to methods
with names consisting of roman numerals, returning the
corresponding integer values.

class Roman
def romanToInt(str)
# ...
end
def method_missing(methId)
str = methId.id2name
romanToInt(str)
end
end

r = Roman.new
r.iv #=> 4
r.xxiii #=> 23
r.mm #=> 2000


--
Eric Hodel - drbrain@segment7.net - http://blog.se...
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