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From: Juan Matias on 8 Jun 2010 08:28
Robert Klemme wrote:
> 2010/6/8 Juan Matias <jmrepetti(a)gmail.com>:
>>>
>> �[1,2].combine([3,4]).combine([5,6,7])
>> � �end
>> � �aux.map {|elem| elem.flatten }
>> �end
>> end
>
> I'd rather do this:
>
> module Enumerable
> def combine(enum)
> if block_given?
> each do |*a|
> enum.each do |*b|
> yield *a, *b
> end
> end
> self
> else
> enum_for(:combine, enum)
> end
> end
> end
>
> [1,2].combine([3,4]) do |*a|
> p a
> end
>
> puts "--------------"
>
> [1,2].combine([3,4]).each do |*a|
> p a
> end
>
> puts "--------------"
>
> [1,2].combine([3,4]).combine([5,6]) do |*a|
> p a
> end
>
> puts "--------------"
>
> [1,2].combine([3,4]).combine([5,6]).each do |*a|
> p a
> end
>
> Kind regards
>
> robert

Great, I'll probe it,also I add a fix to my code:

class Array
def combine(otherArray)
aux = []
return otherArray if self.empty? #this line
self.each do |self_elem|
otherArray.each do |other_elem|
aux << [self_elem,other_elem]
end
end
aux.map {|elem| elem.flatten }
end
end

Juan Matias
--
Posted via http://www.ruby-forum.com/.

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