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From: Richard Fateman on 21 Feb 2010 04:23
pipehappy wrote:
> Hi, All
>
> Is there a way to use multiple variables in pure function with map.
>
> What I want to do is like this:
>
> ab = {{1, 2}, {2, 3}, {3, 4}};
> (#[[1]] + #[[2]]) & /@ ab
> {3, 5, 7}
>
> Instead of refer to elements in list I want to use multiple variables
> in pure function.
>
> something like this:
> ab = {{1, 2}, {2, 3}, {3, 4}};
> (#1 + #2) & /@ ab
> To do the same thing as the above example.
>
> Best
>
> -- pipehappy
>

Maybe you should look at MapThread.

You could do this:

newab = Table[Table[ab[[i]][[j]], {i, 1, 3}], {j, 1, 2}]

MapThread[(#1+#2)&,newab]


or you could define a function f[{x_,y_}]:= x+y and use Map[f,ab]
but that is not a pure function.



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