From: Rob Biedenharn <Rob@...>
Date: 2008-02-07T11:23:17+09:00
Subject: Re: Array Practice

On Feb 6, 2008, at 8:30 PM, Clifford Heath wrote:

> Curt Sampson wrote:
>> On 2008-02-07 08:20 +0900 (Thu), Adam Akhtar wrote:
>>> [1,2,3,1,2,2,4,3,2,1]
>>> and then grouping them together and putting them in subarrays  
>>> within an
>>> array like this
>>> [ [1,1,1], [2,2,2,2] , [3,3] ,[4] ]
>> The Array#assoc method is your friend here.
>
> Really? Where's the array containing arrays come from?
>
> ------------------------------------------------------------  
> Array#assoc
>    array.assoc(obj)   ->  an_array  or  nil
> ------------------------------------------------------------------------
>    Searches through an array whose elements are also arrays  
> comparing     obj with the first element of each contained array  
> using obj.==.     Returns the first contained array that matches  
> (that is, the first     associated array), or nil if no match is  
> found. See also     Array#rassoc.
>
> Clifford Heath.


Array#assoc searches an existing array of arrays; it doesn't build one.

[ [1,1,1], [2,2,2,2] , [3,3] ,[4] ].assoc(2) => [2,2,2,2]
[ [1,1,1], [2,2,2,2] , [3,3] ,[4] ].assoc(5) => nil

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com