Selecting every last element of a nested list

Question

I couldn't find a similar question so I decided to ask this one. I have a nested list with many sublists of equal length. To make things easier let's say it's like that:

list={{2,1,7},{3,9,5},{4,8,6}}

I'd like to get a list of last elements from each sublist, in this case:

{7,5,6}

I'm not sure whether i should think of a pattern to do this or is there a simpler way?

Here are a few options: 1. Last /@ list 2. list[[All, -1]] 3. list /. {___, i_Integer} :> i — rm -rf, Jan 27 '14 at 16:53

score 9 · Accepted Answer · answered Jan 27 '14 at 16:54

9

It is

list = {{2, 1, 7}, {3, 9, 5}, {4, 8, 6}};
list[[All, -1]]
(* {7, 5, 6} *)

or

Last /@ list
(* {7, 5, 6} *)

answered Jan 27 '14 at 16:54

halirutan

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3

For beginners, the latter command is shorthand for Map[Last[#]&,list] – Michael Stern Jan 27 '14 at 17:10
2

Actually Map[Last, list] – Rojo Jan 27 '14 at 19:39
@Rojo Hehe... :-) – halirutan Jan 27 '14 at 20:38

Selecting every last element of a nested list

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