From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2012-08-17T15:19:15+09:00
Subject: Re: variable from array to function to array

On Fri, Aug 17, 2012 at 2:39 AM, Dave Castellano <lists@ruby-forum.com> wrote:
> anyone know if it is possible to pass elements from an array (eg 20,50 )
> to the function
> number_range(min,max) and have the returned value used in the variable
> |age| below...
>
>
> def number_range(min,max)         # Chooses a random number within
> specified range.
>   num = min + rand(max - min)
> end
>
> array = [ lambda { |age| "An #{age} year old..."}, 20, 50 ]
>
> puts array[0][age returned from number_range method]
>
>
>>>  An 18 year old...

The obvious thing would be:

puts array[0][number_range(array[1], array[2])]

but this data structure starts to be too complicated. Why is it an
array? Will you have some (many) more entries (lambda + range)? If so,
you could be better off with a class to represent that information:

RangedInterpolation = Struct.new :lambda, :min, :max

array = [ RangedInterpolation.new(lambda { |age| "An #{age} year
old..."}, 20, 50) ]
array.each {|interpolation| puts
interpolation.lambda(number_range(interpolation.min,
interpolation.max))}

You could go one step further and make the pair min,max a Range
object, and even include the number_range method inside the class.

Jesus.