Sort a matrix according to one row in Mathematica

Question

I'm fairly new to Mathematica and I've come across a probably stupid problem.

I have a matrix {{1,1,1,2,2,2,2,2},{-1,0,1,-2,-1,0,1,2}} and I would like to sort the second row but also that the positions of the elements of the first row are sorted at the same time.

Thus, the array would become {{2,1,2,1,2,1,2,2},{-2,-1,-1,0,0,1,1,2}}. I hope is it clear. Do you know how I could proceed?

Thanks in advance.

Answer 1

Let

list = {{1, 1, 1, 2, 2, 2, 2, 2}, {-1, 0, 1, -2, -1, 0, 1, 2}}

then

{list[[1]][[Ordering[list[[2]]]]], Sort[list[[2]]]}

gives the output you are looking for.

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