From: Elliot Temple <curi@...>
Date: 2006-06-05T16:23:45+09:00
Subject: Re: mode

On Jun 4, 2006, at 11:31 PM, Alder Green wrote:
> li.uniq.collect {|i| [li.select {|j| j == i}.size, i]}.sort.last.last

cool, thanks, collecting pairs works well.

On Jun 4, 2006, at 11:40 PM, Daniel Sheppard wrote:

>
>> -----Original Message-----
>> From: Elliot Temple [mailto:curi@curi.us]
>>
>> I bet there's a more elegant way to write this. Anyone want
>> to show me?
>>
>> def mode(li)
> ...
>> end
>
> It would probably help if you said what you were trying to achieve
> rather than asking people to try and interpret code that you admit  
> isn't
> elegant.

Mode means:

(Statistics) the value that occurs most frequently in a given set of  
data.

> class Array
>   def mode
>     count = Hash.new(0)
>     each {|x| count[x] += 1 }
>     count.sort_by{|k,v|v}.last[0]
>   end
> end

that's a nice way :)

-- Elliot Temple
http://www.curi.us/blog/