From: Charles Snider <charlie@...>
Date: 2008-02-07T11:47:31+09:00
Subject: Re: Array Practice

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one line (36 chars) with uniq, map, and select

On Feb 6, 2008 7:23 PM, Rob Biedenharn <Rob@agileconsultingllc.com> wrote:

> 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
>
>
>
>

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