From: Tod Beardsley <todb@...>
Date: 2008-09-17T00:08:56+09:00
Subject: Re: array question

Case 1 and 2, maybe the desired result?

irb(main):088:0> def there_can_be_only_one(arr)
irb(main):089:1>   arr.sort!.collect {|x| (arr[arr.index(x)] !=
arr[arr.index(x)+1] ? x:nil)}.compact
irb(main):090:1>   end
=> nil
irb(main):091:0> there_can_be_only_one([1,2,3] + [1,4,7])
=> [2, 3, 4, 7]
irb(main):092:0> there_can_be_only_one([1,2,2,3] + [1,4,7,7])
=> [3, 4]
irb(main):093:0>

...assumes the elements to be compared are all the same type (Fixnums
can't sort with Strings, eg)

On Tue, Sep 16, 2008 at 9:29 AM, Nathan Powell <nathan@nathanpowell.org> wrote:
> On Tue, Sep 16, 2008 at 11:25:00PM +0900, Amos King wrote:
>> Forgot to ask what he was looking for.
>
> In the original email:
>
> <snip>
> For example, array1=[1,2,3],array2=[1,4,7]
> the return array is [2,3,4,7]
> </snip>
>
> It's not entirely clear as one could arrive at that final array a couple
> ways.
>
> --
> nathan
> nathan_at_nathanpowell_dot_org
>
> At this point, anyone proposing to run Windows on servers should be prepared
> to explain what they know about servers that Google, Yahoo, and Amazon don't.
>                 ~ Paul Graham
> ------------------------------------
>
>



-- 
todb@planb-security.net | ICQ: 335082155 | Note: Due to Google's
privacy policy <http://tinyurl.com/5xbtl> and the United States'
policy on electronic surveillance <http://tinyurl.com/muuyl>,
please do not IM/e-mail me anything you wish to remain secret.