From: Enrique Comba Riepenhausen <ecomba@...>
Date: 2007-05-11T17:27:31+09:00
Subject: Re: how to remove dups from 2 lists?


On 11 May 2007, at 10:23, Brian Candler wrote:

> On Fri, May 11, 2007 at 04:55:14PM +0900, Enrique Comba  
> Riepenhausen wrote:
>> Do you want to remove the elements that are in the same position on
>> the lists and are equal?
>>
>> If so I would say:
>>
>> require 'generator'
>>
>> list1 = [1,1,2,3,4,6] # => I included the 6 to show what I mean...
>> list2 = [2,2,3,5,5,6] # => I included the 6 to show what I mean...
>>
>> def RemoveDupsFromLists ( list1 , list2 )
>>   lists = SyncEnumerator.new(list1, list2)
>>   lists.each { |element_list1, element_list2|
>>
>>     if list1[element_list1] == list2[element_list2]
>>       list1.delete(element_list1)
>>       list2.delete(element_list2)
>>     end
>>   }
>> end
>
> Is it safe to delete from lists while you're enumerating through them?

Actually not ;) It depends if other objects are trying to access  
those lists at the same time though...