From: Eleanor McHugh <eleanor@...>
Date: 2008-05-29T00:24:00+09:00
Subject: Re: The duck's backside


On 28 May 2008, at 14:15, Tobias Weber wrote:

> In article
> <9560F017-58CA-48EB-BCC3-3B16758516C1@games-with-brains.com>,
> Eleanor McHugh <eleanor@games-with-brains.com> wrote:
>
>>>     uaid = "ignore"
>
> Ups, shoulda been c =

Which makes things simpler ;)

	doit a, b, c = nil
		raise ArgumentError, "needs exactly one additional argument" if b && c
		v = b || c
		raise ArgumentError, "need a numeric parameter" unless v.respond_to? 
(:to_int)
		@post "first=#{a}&" + (b.nil? ? "second=ignored&third=#{v}" :  
"second=#{v}&third=ignored")
	end

> So that doit() is only passed legal values? That should be the case,  
> but
> I want to make extra sure not to give that foreign web service  
> something
> it can't swallow.
>
>> 	def doit a, v, param = :second
>> 		raise ArgumentError, "needs a numeric value" unless v.respond_to? 
>> (:to_int)
>> 		v = "ignore" if (param == :third) && v > 0
>
> That is essentially overloading doit() for first or second parameter,
> and a good idea! So far I just wrapped the http calls in convenience
> methods one by one.

I'm not suggesting it's a good idea...


Ellie

Eleanor McHugh
Games With Brains
http://slides.games-with-brains.net
----
raise ArgumentError unless @reality.responds_to? :reason